The Experts below are selected from a list of 280887 Experts worldwide ranked by ideXlab platform
Akira Yamauchi - One of the best experts on this subject based on the ideXlab platform.
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dry Matter Production in relation to root plastic development oxygen transport and water uptake of rice under transient soil moisture stresses
Plant and Soil, 2010Co-Authors: Roel Rodriguez Suralta, Yoshiaki Inukai, Akira YamauchiAbstract:Drought and waterlogging are important abiotic stresses negatively affecting plant growth and development. They are transiently recurring in rainfed lowlands and in water-saving system practicing intermittent irrigation. This study aimed to determine the contribution of plastic development and associated physiological responses of roots to shoot dry Matter Production under transient soil moisture stresses. To minimize effect of genetic confounding, a selected line (CSSL47) drawn from 54 chromosome segment substitution lines (CSSL) of Nipponbare (japonica type) carrying an overlapping chromosome segments of Kasalath (indica type), was used and compared with the recurrent parent Nipponbare. Under transient droughted-to-waterlogged (D–W) conditions, CSSL47 showed greater shoot dry Matter Production than Nipponbare. This was due largely to its greater root system development through high induction of aerenchyma formation. Consequently, aerenchyma development effectively facilitated the internal diffusion of oxygen (O2) to the root tips under sudden waterlogged condition supporting rapid recovery of stomatal conductance, transpiration, and photosynthesis. Likewise, CSSL47 showed greater shoot dry Matter Production than Nipponbare under transient waterlogged-to-droughted (W–D) conditions. This was due to CSSL47’s greater root system development through more initiation of L type lateral roots that effectively maintained soil water uptake. This in turn sustained higher stomatal conductance, transpiration, and photosynthesis. Results implied that utilization of CSSLs could precisely reveal that root plastic development in response to transient soil moisture stresses contributed to the maintenance of shoot dry Matter Production.
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Dry Matter Production and Root System Development of Rice Cultivars under Fluctuating Soil Moisture
Plant Production Science, 2000Co-Authors: Dionisio M. Banoc, Akira Yamauchi, Akihiko Kamoshita, Len J. Wade, J.r. PardalesAbstract:AbstractRice plants in the rainfed areas are mostly grown under fluctuating soil moisture. We examined responses in dry Matter Production, root development and water use to changing soil moisture in diverse rice cultivars. Rice plants were grown in polyvinyl chloride tubes under glasshouse conditions. Progressive drought right after planting greatly inhibited the shoot dry Matter Production, tiller development, nodal root development and water uptake in all cultivars tested. When the plants experienced soil submergence before being exposed to drought, all the cultivars exhibited higher dry Matter Production than their well-watered counterparts. Cultivar differences were clearly noted in the growth responses to rewatering after these plants were droughted. With well–watered control as basis, IRAT 109 and KDML 105 plants increased efficiency in converting available dry Matter to increase their total root length by means of enhanced lateral root development. In the latter, however, the dry weight of roots al...
Roel Rodriguez Suralta - One of the best experts on this subject based on the ideXlab platform.
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dry Matter Production in relation to root plastic development oxygen transport and water uptake of rice under transient soil moisture stresses
Plant and Soil, 2010Co-Authors: Roel Rodriguez Suralta, Yoshiaki Inukai, Akira YamauchiAbstract:Drought and waterlogging are important abiotic stresses negatively affecting plant growth and development. They are transiently recurring in rainfed lowlands and in water-saving system practicing intermittent irrigation. This study aimed to determine the contribution of plastic development and associated physiological responses of roots to shoot dry Matter Production under transient soil moisture stresses. To minimize effect of genetic confounding, a selected line (CSSL47) drawn from 54 chromosome segment substitution lines (CSSL) of Nipponbare (japonica type) carrying an overlapping chromosome segments of Kasalath (indica type), was used and compared with the recurrent parent Nipponbare. Under transient droughted-to-waterlogged (D–W) conditions, CSSL47 showed greater shoot dry Matter Production than Nipponbare. This was due largely to its greater root system development through high induction of aerenchyma formation. Consequently, aerenchyma development effectively facilitated the internal diffusion of oxygen (O2) to the root tips under sudden waterlogged condition supporting rapid recovery of stomatal conductance, transpiration, and photosynthesis. Likewise, CSSL47 showed greater shoot dry Matter Production than Nipponbare under transient waterlogged-to-droughted (W–D) conditions. This was due to CSSL47’s greater root system development through more initiation of L type lateral roots that effectively maintained soil water uptake. This in turn sustained higher stomatal conductance, transpiration, and photosynthesis. Results implied that utilization of CSSLs could precisely reveal that root plastic development in response to transient soil moisture stresses contributed to the maintenance of shoot dry Matter Production.
Qi-gen Dai - One of the best experts on this subject based on the ideXlab platform.
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Analysis on Dry Matter Production Characteristics of Super Hybrid Rice
Rice Science, 2008Co-Authors: Hong-cheng Zhang, Ying-fei Qian, Ye Cheng, Chao-qun Zhai, Qi-gen DaiAbstract:Six middle-season indica hybrid rice combinations, including five super hybrid rice combinations with the high yield about 10.5 t/ha and a check hybrid rice combination Shanyou 63 with a yield potential about 9.5 t/ha, were used as materials to study the dry Matter Production characteristics. The super hybrid rice showed a high ability in dry Matter Production and accumulation and its yield enhanced with the increase of dry Matter accumulation. The advantage period of dry Matter Production in the super hybrid rice was mainly at the middle and late growth stages compared with the check. The grain yield had no significant correlation with the dry Matter accumulation before the elongation stage while had a significantly positive correlation with the dry Matter accumulation from the elongation to maturity stages in super hybrid rice. There were more dry Matter in vegetative organs at the heading stage in the super hybrid rice but its contribution to yield (apparent conversion percentage) was averagely 4.3 percent points lower than that in the check. For crop growth rate (CGR), the comparative advantage of super hybrid rice was at the middle and late stages, especially after flowering. Moreover, as the rising of leaf area index (LAI) and leaf area duration (LAD), CGR enhanced. The total LAD and the mean of LAD per day of super hybrid rice was about 14.79% and 10.31% higher than those of the check, respectively. The results indicate that the high yield of super hybrid rice mostly comes from the products of photosynthesis after heading, which is shown by the increased CGR at middle and later stages. It is suggested that LAD character might be used to better explain the advantage in the dry Matter Production of super hybrid rice than LAI.
Hongxin Cao - One of the best experts on this subject based on the ideXlab platform.
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CCTA (1) - Models of Dry Matter Production and Yield Formation for the Protected Tomato
Computer and Computing Technologies in Agriculture V, 2012Co-Authors: Yuli Chen, Zhiyou Zhang, Yan Liu, Yan Zhu, Hongxin CaoAbstract:[Objective] In order to quantify the yield formation of protected tomato, [Method] the field experiments on varieties and fertilizer were conducted in 2009 and 2010, and cultivars: (B1) American mole 1 (early maturing), (B2) Chaoshijifanqiedawang (late maturing), and (B3) American 903 (medium maturing) were adopted; The models of dry Matter Production and yield formation for protected tomato were built by analyzing the relationships between yield and the number of fruit letting and the mean fruit weight, between yield and biomass and the economic coefficient at harvest, and between the mean fruit weight and economic coefficient and biomass of different varieties and fertilizer levels in accordance with the theory of yield formation. Independent experiments data was used to validate the models. [Result] The results showed that root mean squared error (RMSE), mean absolute error (Xde), and the determined coefficient (R2) between the simulated and measured values of dry Matter Production was 363.135kg/ha (n=63), 79.016kg/ha, and 0.900, respectively, and RMSE, Xde, and R2 between the simulated and measured values of yield based on yield components was 186.842g per plant (n=36), -1.069g per plant, and 0.854, respectively, and RMSE, Xde, and R2 between the simulated and measured values of yield based on economic coefficient was 137.302g per plant (n=27), 21.170g per plant, and 0.785, respectively. [Conclusion] It indicated that the dry Matter Production and yield formation under different varieties and fertilizer levels for protected tomato could be well simulated by these models.
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Models of Dry Matter Production and Yield Formation for the Protected Tomato
2011Co-Authors: Yuli Chen, Zhiyou Zhang, Yan Liu, Yan Zhu, Hongxin CaoAbstract:[Objective] In order to quantify the yield formation of protected tomato, [Method] the field experiments on varieties and fertilizer were conducted in 2009 and 2010, and cultivars: (B1) American mole 1 (early maturing), (B2) Chaoshijifanqiedawang (late maturing), and (B3) American 903 (medium maturing) were adopted; The models of dry Matter Production and yield formation for protected tomato were built by analyzing the relationships between yield and the number of fruit letting and the mean fruit weight, between yield and biomass and the economic coefficient at harvest, and between the mean fruit weight and economic coefficient and biomass of different varieties and fertilizer levels in accordance with the theory of yield formation. Independent experiments data was used to validate the models. [Result] The results showed that root mean squared error (RMSE), mean absolute error (Xde), and the determined coefficient (R2) between the simulated and measured values of dry Matter Production was 363.135kg/ha (n=63), 79.016kg/ha, and 0.900, respectively, and RMSE, Xde, and R2 between the simulated and measured values of yield based on yield components was 186.842g per plant (n=36), -1.069g per plant, and 0.854, respectively, and RMSE, Xde, and R2 between the simulated and measured values of yield based on economic coefficient was 137.302g per plant (n=27), 21.170g per plant, and 0.785, respectively. [Conclusion] It indicated that the dry Matter Production and yield formation under different varieties and fertilizer levels for protected tomato could be well simulated by these models.
Yoshiaki Inukai - One of the best experts on this subject based on the ideXlab platform.
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dry Matter Production in relation to root plastic development oxygen transport and water uptake of rice under transient soil moisture stresses
Plant and Soil, 2010Co-Authors: Roel Rodriguez Suralta, Yoshiaki Inukai, Akira YamauchiAbstract:Drought and waterlogging are important abiotic stresses negatively affecting plant growth and development. They are transiently recurring in rainfed lowlands and in water-saving system practicing intermittent irrigation. This study aimed to determine the contribution of plastic development and associated physiological responses of roots to shoot dry Matter Production under transient soil moisture stresses. To minimize effect of genetic confounding, a selected line (CSSL47) drawn from 54 chromosome segment substitution lines (CSSL) of Nipponbare (japonica type) carrying an overlapping chromosome segments of Kasalath (indica type), was used and compared with the recurrent parent Nipponbare. Under transient droughted-to-waterlogged (D–W) conditions, CSSL47 showed greater shoot dry Matter Production than Nipponbare. This was due largely to its greater root system development through high induction of aerenchyma formation. Consequently, aerenchyma development effectively facilitated the internal diffusion of oxygen (O2) to the root tips under sudden waterlogged condition supporting rapid recovery of stomatal conductance, transpiration, and photosynthesis. Likewise, CSSL47 showed greater shoot dry Matter Production than Nipponbare under transient waterlogged-to-droughted (W–D) conditions. This was due to CSSL47’s greater root system development through more initiation of L type lateral roots that effectively maintained soil water uptake. This in turn sustained higher stomatal conductance, transpiration, and photosynthesis. Results implied that utilization of CSSLs could precisely reveal that root plastic development in response to transient soil moisture stresses contributed to the maintenance of shoot dry Matter Production.