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Hamako Sasamoto - One of the best experts on this subject based on the ideXlab platform.
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an inverse relationship between allelopathic activity and salt tolerance in suspension cultures of three mangrove species Sonneratia alba s caseolaris and s ovata development of a bioassay method for allelopathy the protoplast co culture method
Journal of Plant Research, 2014Co-Authors: Ai Hasegawa, Reiko Minagawa, Tomoya Oyanagi, Yoshiharu Fujii, Hamako SasamotoAbstract:A bioassay method for allelopathy, the ‘protoplast co-culture method’ was developed to study the relationship between salt tolerance and allelopathy of three mangrove species, Sonneratia alba, S. caseolaris, and S. ovata. Plants of S. alba grow in the seaward-side high salinity region and plants of the latter two species grow in upstream-side regions of a mangrove forest, respectively. Effects of five sea salts (NaCl, KCl, MgCl2, MgSO4 and CaCl2) on the growth of the suspension cells of the latter two species were first investigated by a small-scale method using 24-well culture plates. S. ovata cells showed higher tolerance than S. caseolaris cells to NaCl and other salts, but were not as halophilic as S. alba cells. Protoplasts isolated from suspension cells were co-cultured with lettuce protoplasts in Murashige and Skoog’s (MS) basal medium containing 1 μM 2,4-dichlorophenoxyacetic acid, 0.1 μM benzyladenine, 3 % sucrose and 0.6–0.8 M osmoticum. S. caseolaris protoplasts had a higher inhibitory effect on lettuce protoplast cell divisions than S. alba protoplasts at any lettuce protoplast density, and the effect of S. ovata was intermediate between the two. These results were similar to those obtained from a different in vitro bioassay method for allelopathy, the ‘sandwich method’ with dried leaves. The inverse relationship between allelopathic activity and salt tolerance in suspension cells of Sonneratia mangroves is discussed.
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effects of sea salts on induction of cell proliferation in liquid cultures of mangrove plants Sonneratia caseolaris and s alba
American Journal of Plant Sciences, 2011Co-Authors: Raiki Yamamoto, Yoshifumi Kawana, Reiko Minagawa, Hamako SasamotoAbstract:The effects of five salt ingredients of sea water, KCl, NaCl, CaCl2, MgCl2 and MgSO4, on induction of cell prolif-eration in Sonneratia caseolaris were investigated. Proliferation was examined in tissue explants derived from such as leaves, cotyledons, and hypocotyls using a small-scale liquid culture method. Addition of 12.5-25 mM of MgCl2 was unique in stimulating cell proliferation in all tissues of S. caseolaris. Otherwise, different effects of salts were observed among the three tissues. In hypocotyl culture, 25-50 mM of NaCl and CaCl2 stimulated cell divisions. Tolerance to 100 mM of MgSO4 was observed in leaves. Three osmotically active compounds commonly used in tissue culture, sorbitol, mannitol and glycinebetaine, were also tested to assess the importance of osmotic effects on cell proliferation. No significant stimulation by these was observed over a wide range of concentrations. Data were compared with those of cotyledon cultures of another mangrove, S. alba, which exhibits no stimulation by MgCl2, stimulation by KCl and tolerance to NaCl. Mechanisms for adaptation of mangrove plants to various and high salts were discussed by comparing the differences in reaction to salts in cultures of two Sonneratia mangrove species of the same genera growing different salt environment.
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purine metabolism in cells of a mangrove plant Sonneratia alba in tissue culture
Journal of Plant Physiology, 1996Co-Authors: Mayo Akatsu, Hamako Sasamoto, Yoshihisa Hosoi, Hiroshi AshiharaAbstract:Summary A tissue culture system was established from pistils of flower buds of a mangrove plant, Sonneratia alba . The optimum growth rate of callus was observed in Murashige and Skoog's medium that contained 50 mM NaCl. In this tissue culture system, we examined the effects of short-term salt stress on the size of the pool of purine nucleotides, as well as the capacity for the salvage and the degradation of purines. At 100 mM NaCl, the size of the total adenylate pool was reduced, but the «adenylate energy charge» was, by contrast, increased. No marked change in the size of guanylate pool occurred in response to NaCl. The rate of conversion of [8- 14 C] adenosine to adenylate was decreased by NaCl, but that to nucleic acids was not significandy affected. In contrast to the results obtained with maize root tips (Peterson et al., 1988), salt stress did not increase the catabolism of [8- 14 C] hypoxanthine. Most of the radioactivity from [8- 14 C] adenosine was accumulated in adenine while that in [8- 14 C] hypoxanthine remained unaffected in Sonneratia alba . The low capacity of the purine-degradation system might ensure a supply of purine bases and nucleosides that can be utilized as substrates for the rapid and efficient biosynthesis of nucleotides by the salvage pathways.
Baderan D. K. - One of the best experts on this subject based on the ideXlab platform.
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Struktur Vegetasi dan Zonasi Mangrove di Wilayah Pesisir Kecamatan Kwandang Kabupaten Gorontalo Utara Provinsi Gorontalo
'Hasanuddin University Faculty of Law', 2019Co-Authors: Baderan D. K.Abstract:Ekosistem hutan mangrove bersifat kompleks dan dinamis, namun juga labil. Dikatakan kompleks karena ekosistemnya dipenuhi oleh vegetasi mangrove, juga merupakan habitat berbagai satwa dan biota perairan. Ekosistem mangrove adalah suatu sistem di alam tempat berlangsungnya kehidupan yang mencerminkan hubungan timbal Balik antara makhluk hidup dengan lingkungannya dan diantara makhluk hidup itu sendiri, terdapat pada wilayah pesisir, terpengaruh pasang surut air laut, dan didominasi oleh spesies pohon atau semak yang khas dan mampu tumbuh dalam perairan asin/payau. Penelitian ini bertujuan untuk mengetahui struktur vegetasi dan zonasi mangrove di wilayah pesisir Kecamatan Kwandang Kabupaten Gorontalo Utara Provinsi Gorontalo. Pengambilan data struktur vegetasi mangrove dengan cara membuat transek segi empat dengan panjang transek dibuat dengan ukuran 30 m x30 m (total transek sebanyak 31 transek).Hasil penelitian menemukan 16 spesies yang mendiami hutan mangrove di wilayah pesisir Kecamatan Kwandang Kabupaten Gorontalo Utara yakni spesies Rhizophora mucronata Blume, Rhizophora Apiculata Lamk, Ceriops decandra (Griff.) Ding Hou, Ceriops tagal (Perr.) C.B.Rob, Brugueira gymnorrhiza (L) Lamk, Bruguiera paviflora (Roxb) W&A, Sonneratia alba J.E. Smith, Soneratia caseolaris (L) Eng, Xylocarpus mulocensis (Lamk) Roem, Xylocarpus granatum Koen (niri), Avecennia alba Blume, Avecennia marina (Forsk) Vierh, Avicennia officinalis (L) Lamk, Acanthus ilicifolius L, Heritiera littoralis Dryand. Ex W.Ait, Aegiceras corniculatum (L.) Blanco.Profil zonasi di wilayah ini masuk pada zonasi sederhana (satu zonasi atau zonasi campuran) dimana dari pinggir pantai sampai pedalaman daratan setiap spesies saling berasosiasi dalam satu lapisan. Profil zonasi di wilayah pesisir Kecamatan Kwandang tidak terdiri atas beberapa zonasi, karena tidak ada zonasi yang murni satu genus saja, yang ditemukan hanya satu zonasi yang merupakan campuran (mixel), dimana setiap spesies tumbuh berulang sampai kearah daratan, dan tumbuh saling bercampur antara 16 spesies tersebut.Keseluruhan spesies yang ditemukan terdapat spesies Ceriops decandra yang merupakan spesies langka secara global sehingga diperlukan perhatian khusus dalam pengelolaan hutan mangrove di wilayah pesisir Kecamatan Kwandang
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STRUKTUR VEGETASI DAN ZONASI MANGROVE DI WILAYAH PESISIR KECAMATAN KWANDANG KABUPATEN GORONTALO UTARA PROVINSI GORONTALO
'Hasanuddin University Faculty of Law', 2019Co-Authors: Baderan D. K.Abstract:Ekosistem hutan mangrove bersifat kompleks dan dinamis, namun juga labil. Dikatakan kompleks karena ekosistemnya dipenuhi oleh vegetasi mangrove, juga merupakan habitat berbagai satwa dan biota perairan. Ekosistem mangrove adalah suatu sistem di alam tempat berlangsungnya kehidupan yang mencerminkan hubungan timbal balik antara makhluk hidup dengan lingkungannya dan diantara makhluk hidup itu sendiri, terdapat pada wilayah pesisir, terpengaruh pasang surut air laut, dan didominasi oleh spesies pohon atau semak yang khas dan mampu tumbuh dalam perairan asin/payau. Penelitian ini bertujuan untuk mengetahui struktur vegetasi dan zonasi mangrove di wilayah pesisir Kecamatan Kwandang Kabupaten Gorontalo Utara Provinsi Gorontalo. Pengambilan data struktur vegetasi mangrove dengan cara membuat transek segi empat dengan panjang transek dibuat dengan ukuran 30 m x30 m (total transek sebanyak 31 transek).Hasil penelitian menemukan 16 spesies yang mendiami hutan mangrove di wilayah pesisir Kecamatan Kwandang Kabupaten Gorontalo Utara yakni spesies Rhizophora mucronata Blume, Rhizophora Apiculata Lamk, Ceriops decandra (Griff.) Ding Hou, Ceriops tagal (Perr.) C.B.Rob, Brugueira gymnorrhiza (L) Lamk, Bruguiera paviflora (Roxb) W&A, Sonneratia alba J.E. Smith, Soneratia caseolaris (L) Eng, Xylocarpus mulocensis (Lamk) Roem, Xylocarpus granatum Koen (niri), Avecennia alba Blume, Avecennia marina (Forsk) Vierh, Avicennia officinalis (L) Lamk, Acanthus ilicifolius L, Heritiera littoralis Dryand. Ex W.Ait, Aegiceras corniculatum (L.) Blanco.Profil zonasi di wilayah ini masuk pada zonasi sederhana (satu zonasi atau zonasi campuran) dimana dari pinggir pantai sampai pedalaman daratan setiap spesies saling berasosiasi dalam satu lapisan. Profil zonasi di wilayah pesisir Kecamatan Kwandang tidak terdiri atas beberapa zonasi, karena tidak ada zonasi yang murni satu genus saja, yang ditemukan hanya satu zonasi yang merupakan campuran (mixel), dimana setiap spesies tumbuh berulang sampai kearah daratan, dan tumbuh saling bercampur antara 16 spesies tersebut.Keseluruhan spesies yang ditemukan terdapat spesies Ceriops decandra yang merupakan spesies langka secara global sehingga diperlukan perhatian khusus dalam pengelolaan hutan mangrove di wilayah pesisir Kecamatan Kwandang.Kata Kunci : Struktur Vegetasi, Zonasi, Spesies Mangrove
N F Y Tam - One of the best experts on this subject based on the ideXlab platform.
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does energetic cost for leaf construction in Sonneratia change after introduce to another mangrove wetland and differ from native mangrove plants in south china
Marine Pollution Bulletin, 2017Co-Authors: Lei Yang, Qijie Zan, P K S Shin, S G Cheung, Yuk Shan Wong, N F Y Tam, Anping LeiAbstract:Exotic species invasions are serious ecological problems. Leaf construction cost (CC) and growth traits of two Sonneratia (Sonneratia caseolaris and S. apetala) and four native species (Bruguiera gymnorrhiza, Kandelia obovata, Aegiceras corniculatum and Avicennia marina) in Hainan and Shenzhen mangrove wetlands were compared to evaluate invasive potentials of Sonneratia after introduced to Shenzhen, their new habitat. There were no significant differences in CC and growth traits between two wetlands, suggesting Sonneratia did not lose any advantage in the new habitat and were competitive in both wetlands. CC per unit mass (CCM), CC per unit area (CCA) and caloric values of Sonneratia were significantly lower than those of native mangrove species while specific leaf area (SLA) was just the opposite. CCM of S. caseolaris and S. apetala were 6.1% and 11.9% lower than those of natives, respectively. These findings indicated the invasive potential of Sonneratia in Shenzhen after their introduction.
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are photosynthetic characteristics and energetic cost important invasive traits for alien Sonneratia species in south china
PLOS ONE, 2016Co-Authors: Qijie Zan, P K S Shin, S G Cheung, Yuk Shan Wong, N F Y Tam, Anping LeiAbstract:A higher photosynthesis and lower energetic cost are recognized as important characteristics for invasive species, but whether these traits are also important for the ability of alien mangrove species to become invasive has seldom been reported. A microcosm study was conducted to compare the photosynthetic characteristics, energetic cost indices and other growth traits between two alien species (Sonneratia apetala and S. caseolaris) and four native mangrove species over four seasons in a subtropical mangrove nature reserve in Shenzhen, South China. The aim of the study was to evaluate the invasive potential of Sonneratia based on these physiological responses. The annual average net photosynthetic rate (Pn), stomatal conductance (Gs) and total carbon assimilation per unit leaf area (Atotal) of the two alien Sonneratia species were significantly higher than the values of the native mangroves. In contrast, the opposite results were obtained for the leaf construction cost (CC) per unit dry mass (CCM) and CC per unit area (CCA) values. The higher Atotal and lower CC values resulted in a 72% higher photosynthetic energy-use efficiency (PEUE) for Sonneratia compared to native mangroves, leading to a higher relative growth rate (RGR) of the biomass and height of Sonneratia with the respective values being 51% and 119% higher than those of the native species. Higher photosynthetic indices for Sonneratia compared to native species were found in all seasons except winter, whereas lower CC values were found in all four seasons. The present findings reveal that alien Sonneratia species may adapt well and become invasive in subtropical mangrove wetlands in Shenzhen due to their higher photosynthetic characteristics coupled with lower costs in energy use, leading to a higher PEUE. The comparison of these physiological responses between S. apetala and S. caseolaris reveal that the former species is more invasive than the latter one, thus requiring more attention in future.
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structure and function of soil microbial community in artificially planted Sonneratia apetala and s caseolaris forests at different stand ages in shenzhen bay china
Marine Pollution Bulletin, 2014Co-Authors: Qiong Yang, Qijie Zan, P K S Shin, S G Cheung, Anping Lei, L N Liu, N F Y TamAbstract:The present study examined the relationships between soil characteristics, microbial community structure and function in the forests artificially planted with exotic Sonneratia apetala at stand ages of 1-, 2-, 7-, 10- and 14-years and Sonneratia caseolaris of 1-, 4-, 7-, 10- and 14-years in Futian National Nature Reserve, Shenzhen Bay, China. The 7-years old forests of both Sonneratia species reached peak growth and had the highest content of nitrogen and phosphorus, enzymatic activities, including dehydrogenase, cellulase, phosphatase, urease and s-glucosidase, except arylsulphatase which increased continuously with stand ages. The microbial community structure reflected by phospholipid fatty acid (PLFA) profiles also reached the maximum value in the 7-years old forests and soil bacterial PLFAs in both forests were significantly higher than fungal PLFAs. The canonical correlation analysis revealed that differences in microbial structural variables were significantly correlated to the differences in their functional variables, and the highest correlation was found between the soil enzymatic activities and the content of carbon and nitrogen.
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influence of plantation of an exotic mangrove species Sonneratia caseolaris l engl on macrobenthic infaunal community in futian mangrove national nature reserve china
Journal of Experimental Marine Biology and Ecology, 2013Co-Authors: Jonathan Y S Leung, N F Y TamAbstract:Abstract Sonneratia caseolaris , a superior mangrove species characterized by rapid growth and proliferation, has been introduced to Futian Mangrove National Nature Reserve, Shenzhen, China for mangrove restoration since 1993. However, the effect of Sonneratia plantation on the macrobenthic infaunal community, a vital component of energy flow and nutrient recycling in mangrove ecosystems, remains obscure. The present study aimed to answer this question by determining the macrobenthic infaunal community, habitat characteristics and physico-chemical properties of sediment in the vegetated sites, dominated by different mangrove species ( Kandelia obovata , Avicennia marina and S. caseolaris ), and un-vegetated mudflat at four sampling times from August 2008 to September 2009. Results showed that the presence of Sonneratia can enhance the biodiversity of macrobenthic infauna in terms of Shannon–Weaver index ( H ′), compared to the mudflat, since August 2008 onwards. Multivariate analyses (CLUSTER and SIMPER) showed that the macrobenthic infaunal community in the Sonneratia site was different from all the other sites due to higher abundance of deposit and filter feeders, including Limnodriloides sp., Capitella capitata , Potamilla acuminata , Tharyx sp. and Ampharete arctica . The presence of Sonneratia , however, could not significantly alter the sediment properties. Spearman correlation analysis revealed that H ′ was negatively correlated with cadmium concentration whereas distance-based linear model (DistLM) suggested that cadmium was a significant predictor variable correlating with the macrobenthic infaunal community. The higher cadmium concentration in August 2008 explained why H ′ was lower and different macrobenthic infaunal communities were observed compared to the other sampling times. However, cadmium was the only significant predictor variable explaining 14.9% total variation, suggesting that the macrobenthic infaunal community was generally not affected by the sediment properties. Therefore, we concluded that Sonneratia plantation in the open mudflat can enhance the biodiversity of macrobenthic infauna in view of higher habitat complexity (e.g. presence of pneumatophores, below-ground vegetation and litter) on condition that the cadmium concentration was below the harmful level.
Benliang Zhao - One of the best experts on this subject based on the ideXlab platform.
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removal of nutrients and heavy metals from wastewater with mangrove Sonneratia apetala buch ham
Ecological Engineering, 2010Co-Authors: Jiaen Zhang, Jinling Liu, Ying Ouyang, Baowen Liao, Benliang ZhaoAbstract:Abstract Mangrove wetlands are important in the removal of nutrients, heavy metals, and organic pollutants from wastewater within estuarine systems due to the presence of oxidized and reduced conditions, periodic flooding by incoming and outgoing tides, and high clay and organic matter content. This study investigated the removal efficiency of nutrients and heavy metals from wastewater by the mangrove Sonneratia apetala Buch-Ham in a simulated wetland. Eight different treatments, namely, three concentration levels of wastewaters, with and without planting of the mangrove species, and one control (with salted water) each for both with and without planting of the mangrove species, were employed in this study. Results showed that the amounts of total mangrove biomass from different treatments were in the following order: PL-TW (planted with ten times higher-than-normal wastewater concentration) > PL-FW (planted with five times higher-than-normal wastewater concentration) > PL-SW (planted with normal wastewater concentration) > PL-NW (planted with no wastewater), whereas the magnitude of the heavy metal contents in the biomass was in the following order: Cu > Pb > Cd > Zn. Very good linear correlations existed between the biomass and the nutrients or heavy metals. The Sonneratia apetala Buch-Ham species had its own selectivity for uptake of heavy metals regardless of the initial heavy metal contents and was more effective in the removal of nutrients than heavy metals. Our study suggested that mangrove wetlands with Sonneratia apetala Buch-Ham species had great potential for the removal of nutrients and heavy metals in coastal areas.
Nelawati 2031511020) - One of the best experts on this subject based on the ideXlab platform.
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Inventarisasi dan analisis vegetasi kawasan sempadan pantai di Kabupaten Bangka Tengah
2020Co-Authors: Nelawati 2031511020)Abstract:Sempadan pantai memiliki dua formasi hutan yaitu hutan mangrove dan hutan pantai. Hutan mangrove dan hutan pantai merupakan jalur hijau daerah pantai yang mempunyai fungsi ekologis dan ekonomis. Salah satu fungsi ekologis vegetasi sempadan pantai yaitu melindungi pantai dari gelombang laut, sedangkan fungsi ekonomis vegetasi sempadan pantai diantaranya sebagai bahan bakar, bahan bangunan, bahan pangan dan obat-obatan. Penelitian ini bertujuan untuk mengetahui ragam jenis, komposisi dan struktur vegetasi kawasan sempadan pantai di Kabupaten Bangka Tengah. Metode yang digunakan dalam pengamatan vegetasi yaitu metode garis transek dan plot. Metode pengambilan sampel dilakukan dengan teknik purposive sampling. Identifikasi vegetasi sempadan pantai dilakukan dengan cara mencocokkan sampel vegetasi dengan koleksi herbarium Bangka Belitungense. Identifikasi vegetasi sempadan pantai juga menggunakan buku panduan pengenalan mangrove di Indonesia. Hasil penelitian menunjukkan bahwa vegetasi yang ditemukan sebanyak 803 individu, 33 jenis dan 22 famili. Jenis vegetasi sempadan pantai yang ditemukan di stasiun I sebanyak 12 jenis, stasiun II sebanyak 8 jenis dan stasiun III sebanyak 25 jenis. Jenis vegetasi yang memiliki nilai INP tertinggi pada tingkat pohon yaitu Sonneratia caseolaris (L.) Engl. dan Pandanus tectorius Parkinson ex Z. sebesar 300%, pada tingkat tiang yaitu Vitex pinnata L. sebesar 300%, pada tingkat pancang yaitu Sonneratia caseolaris (L.) Engl. dan Vitex pinnata L. sebesar 200% dan pada tingkat semai yaitu Sonneratia caseolaris (L.) Engl. dan Rhizophora apiculata BI. sebesar 200%. Indeks keanekaragaman tertinggi terdapat di stasiun III yaitu 4,4 yang tergolong kategori tinggi. Indeks dominansi tertinggi terdapat di stasiun II yaitu 0,5 yang tergolong kategori sedang. Indeks kemerataan tertinggi terdapat di stasiun III yaitu 0,8 yang tergolong kategori tinggi
