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K. N. Guruprasad - One of the best experts on this subject based on the ideXlab platform.
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Similarities in the biochemical changes between solar UV exclusion and GA application in Amaranthus caudatus
Physiology and molecular biology of plants : an international journal of functional plant biology, 2009Co-Authors: Anand Sharma, K. N. GuruprasadAbstract:Seedlings of Amaranthus caudatus grown under UV exclusion filters (-UV -B
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similarities in the biochemical changes between solar uv exclusion and ga application in Amaranthus caudatus
Physiology and Molecular Biology of Plants, 2009Co-Authors: Anand Sharma, K. N. GuruprasadAbstract:Seedlings of Amaranthus caudatus grown under UV exclusion filters (-UV -B <320nm; -UV -B/A <400nm) in the ambient solar radiation showed an enhancement in growth. This was accompanied by reduction in the synthesis of betacyanin but enhancement in the level of amino acids and proteins. The growth promotion and the accompanying biochemical changes were similar to the external application of GA3 to the seedlings under ambient solar radiation. The results are discussed in the light of similarities between UV exclusion and GA3 application in terms of diversion of amino acid precursors towards enhanced primary metabolism.
Anand Sharma - One of the best experts on this subject based on the ideXlab platform.
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Similarities in the biochemical changes between solar UV exclusion and GA application in Amaranthus caudatus
Physiology and molecular biology of plants : an international journal of functional plant biology, 2009Co-Authors: Anand Sharma, K. N. GuruprasadAbstract:Seedlings of Amaranthus caudatus grown under UV exclusion filters (-UV -B
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similarities in the biochemical changes between solar uv exclusion and ga application in Amaranthus caudatus
Physiology and Molecular Biology of Plants, 2009Co-Authors: Anand Sharma, K. N. GuruprasadAbstract:Seedlings of Amaranthus caudatus grown under UV exclusion filters (-UV -B <320nm; -UV -B/A <400nm) in the ambient solar radiation showed an enhancement in growth. This was accompanied by reduction in the synthesis of betacyanin but enhancement in the level of amino acids and proteins. The growth promotion and the accompanying biochemical changes were similar to the external application of GA3 to the seedlings under ambient solar radiation. The results are discussed in the light of similarities between UV exclusion and GA3 application in terms of diversion of amino acid precursors towards enhanced primary metabolism.
Crisologo Bueno, Carlos Fernando - One of the best experts on this subject based on the ideXlab platform.
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Efecto de la sustitución parcial de Harina de Trigo (triticum aestivum) por Harina de Kiwicha (Amaranthus caudatus) en la elaboración de galletas nutritivas, Trujillo, abril - julio, 2019
'Universidad Cesar Vallejo', 2019Co-Authors: Crisologo Bueno, Carlos FernandoAbstract:Trabajo de investigaciónTrujilloEscuela Académico Profesional de Ingeniería AgroindustrialProcesos AgroindustrialesEl presente trabajo de investigación denominado efecto de la sustitución parcial de harina de trigo (Triticum aestivum) por harina de kiwicha (Amaranthus caudatus) en la elaboración de galletas nutritivas, Trujillo, abril - julio, 2019. Se consideraron como objetivo general evaluar el efecto de la sustitución parcial de harina de trigo (Triticum aestivum) por harina de kiwicha (Amaranthus caudatus) en la elaboración de galletas nutritivas, y como objetivos específicos determinar la textura de galletas nutritivas, determinar la composición proximal de galletas nutritivas y determinar la aceptabilidad general de galletas nutritivas. Las muestras fueron tomadas al azar, considerando 4 tratamientos con 3 réplicas cada uno. Se elaborarán las siguientes formulaciones, T0: 100% - 0%, T1: 90% - 10%, T2: 85% - 15%, T3: 80% - 20%, de harina de trigo y harina de kiwicha respectivamente. Se logró concluir que la sustitución parcial de harina de trigo por harina de kiwicha efecto significativamente en la composición proximal y textura en las galletas nutritivas
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Efecto de la sustitución parcial de Harina de Trigo (triticum aestivum) por Harina de Kiwicha (Amaranthus caudatus) en la elaboración de galletas nutritivas, Trujillo, abril - julio, 2019
'Universidad Cesar Vallejo', 2019Co-Authors: Crisologo Bueno, Carlos FernandoAbstract:El presente trabajo de investigación denominado efecto de la sustitución parcial de harina de trigo (Triticum aestivum) por harina de kiwicha (Amaranthus caudatus) en la elaboración de galletas nutritivas, Trujillo, abril - julio, 2019. Se consideraron como objetivo general evaluar el efecto de la sustitución parcial de harina de trigo (Triticum aestivum) por harina de kiwicha (Amaranthus caudatus) en la elaboración de galletas nutritivas, y como objetivos específicos determinar la textura de galletas nutritivas, determinar la composición proximal de galletas nutritivas y determinar la aceptabilidad general de galletas nutritivas. Las muestras fueron tomadas al azar, considerando 4 tratamientos con 3 réplicas cada uno. Se elaborarán las siguientes formulaciones, T0: 100% - 0%, T1: 90% - 10%, T2: 85% - 15%, T3: 80% - 20%, de harina de trigo y harina de kiwicha respectivamente. Se logró concluir que la sustitución parcial de harina de trigo por harina de kiwicha efecto significativamente en la composición proximal y textura en las galletas nutritivas
J. Kępczyński - One of the best experts on this subject based on the ideXlab platform.
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Implication of Ethylene in the Release of Secondary Dormancy in Amaranthus caudatus L. Seeds by Gibberellins or Cytokinin
Plant Growth Regulation, 2006Co-Authors: J. Kępczyński, M. Bihun, Ewa KępczyńskaAbstract:Ethephon (Eth), gibberellin A3, A4 + 7 (GA3, GA4 + 7), and 6-benzyladenine (BA) removed secondary dormancy of Amaranthus caudatus seeds. The GAs and BA potentiated the effect of ethephon or 1-aminocyclopropane-1-carboxylic acid (ACC), an ethylene biosynthesis precursor, in terms of the rate or final percent of germination. Aminoethoxyvinylglycine (AVG), an ACC synthase activity inhibitor, was observed to simultaneously inhibit the release from dormancy effected by GA3 or BA as well as the ethylene production stimulated by these regulators. Breaking of secondary dormancy by GA3, GA4 + 7 or BA was prevented by 2,5-norbornadiene (NBD), an inhibitor of ethylene binding. Ethylene completely or markedly reversed the inhibitory effect of NBD. We thus conclude that the removal of secondary dormancy in Amaranthus caudatus seeds by gibberellin or benzyladenine involves ethylene biosynthesis and action.
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Endogenous ethylene and reversing methyl jasmonate inhibition of Amaranthus caudatus seed germination by benzyladenine or gibberellin
Plant Growth Regulation, 2003Co-Authors: Bożena Białecka, J. KępczyńskiAbstract:BA at 10^−5 M , GA_3 at 3×10^−4 M or GA_4+7 at 3×10^−5 M partially or largely reversed the inhibition of Amaranthus caudatus seed germination due to JA-Me. BA or GA_3 did not affect ethylene production and ACC oxidase activity in vivo in the presence of JA-Me before radicle protrusion. However, both increased ethylene production after 72 h of incubation, when the reversal of the JA-Me inhibition of seed germination was observed. AVG at 3×10^−4 M decreased ethylene production when it was applied simultaneously with BA and JA-Me or GA_3 and JA-Me, but it had no effect on seed germination. NBD almost completely reversed the stimulatory effect of BA, GA_3 or GA_4+7 on the germination of seeds in the presence of JA-Me. Exogenous ethylene reversed the inhibitory effect of NBD. The results indicate that action of endogenous ethylene is involved in the response of JA-Me inhibited seeds to BA or GA_s.
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Regulation of α-amylase activity in Amaranthus caudatus seeds by methyl jasmonate, gibberellin A3, benzyladenine and ethylene
Plant Growth Regulation, 2003Co-Authors: Bożena Białecka, J. KępczyńskiAbstract:Methyl jasmonate (JA-Me) at 10−3Minhibited Amaranthus caudatus seed germination anddecreased α-amylase activity. Exogenous gibberellin A3(GA3) and ethylene, but not benzyladenine (BA), increased activity ofthe enzyme in the presence of JA-Me, with ethylene being the most effective. Theinhibitor of ethylene action, 2,5-norbornadiene (NBD) inhibited seed germinationand decreased α-amylase activity. The inhibitory action of JA-Me onAmaranthus caudatus seed germination is associated with theinhibition of α-amylase activity. Exogenous GA3 and ethylenecontrol both α-amylase activity and seed germination in the presence of JA-Me.
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The release of secondary dormancy by ethylene in Amaranthus caudatus L. seeds
Seed Science Research, 2003Co-Authors: J. Kępczyński, M. Bihun, Ewa KępczyńskaAbstract:Neither ethylene nor 1-aminocyclopropane-1-carboxylic acid (ACC) was able to prevent the induction of secondary dormancy of Amaranthus caudatus at 45°C. Both ethylene (4.5 × 10 -9 –4.5 × 10 -7 M) and ACC (10 -3 –10 -2 M) removed secondary dormancy at 25°C, although ethylene was much more effective. The presence of ethylene for only 10 h was sufficient to remove secondary dormancy in almost all seeds. Incubation of secondary dormant seeds for up to 5 d at 25°C did not change sensitivity to ethylene. The breaking of secondary dormancy by ethylene was prevented by 2,5-norbornadiene (NBD; 1.5 × 10 -5 –3 × 10 -4 M), indicating the physiological action of ethylene. Abscisic acid (ABA; 10 -4 –10 -3 M) increased the requirement for exogenous ethylene. It is suggested that secondary dormancy in A. caudatus seeds might be related to insufficient ethylene production associated with an insufficient amount of ACC.
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Ethylene and Gibberellin in Secondary Dormancy Releasing of Amaranthus caudatus Seeds
Biology and Biotechnology of the Plant Hormone Ethylene II, 1999Co-Authors: J. Kępczyński, M. BihunAbstract:Although studies on ethylene and seed germination began 70 years ago many questions remain [1, 2]. Especially the knowledge on the role of ethylene in the release of secondary dormancy in seeds is insufficient. This work shows reactions of secondary dormant (thermodormant) Amaranthus caudatus seeds to ethylene, ACC, GA3, ethylene + GA3 and effect of GA3 on ethylene production and ACC oxidase activity in vivo.
Bożena Białecka - One of the best experts on this subject based on the ideXlab platform.
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Endogenous ethylene and reversing methyl jasmonate inhibition of Amaranthus caudatus seed germination by benzyladenine or gibberellin
Plant Growth Regulation, 2003Co-Authors: Bożena Białecka, J. KępczyńskiAbstract:BA at 10^−5 M , GA_3 at 3×10^−4 M or GA_4+7 at 3×10^−5 M partially or largely reversed the inhibition of Amaranthus caudatus seed germination due to JA-Me. BA or GA_3 did not affect ethylene production and ACC oxidase activity in vivo in the presence of JA-Me before radicle protrusion. However, both increased ethylene production after 72 h of incubation, when the reversal of the JA-Me inhibition of seed germination was observed. AVG at 3×10^−4 M decreased ethylene production when it was applied simultaneously with BA and JA-Me or GA_3 and JA-Me, but it had no effect on seed germination. NBD almost completely reversed the stimulatory effect of BA, GA_3 or GA_4+7 on the germination of seeds in the presence of JA-Me. Exogenous ethylene reversed the inhibitory effect of NBD. The results indicate that action of endogenous ethylene is involved in the response of JA-Me inhibited seeds to BA or GA_s.
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Regulation of α-amylase activity in Amaranthus caudatus seeds by methyl jasmonate, gibberellin A3, benzyladenine and ethylene
Plant Growth Regulation, 2003Co-Authors: Bożena Białecka, J. KępczyńskiAbstract:Methyl jasmonate (JA-Me) at 10−3Minhibited Amaranthus caudatus seed germination anddecreased α-amylase activity. Exogenous gibberellin A3(GA3) and ethylene, but not benzyladenine (BA), increased activity ofthe enzyme in the presence of JA-Me, with ethylene being the most effective. Theinhibitor of ethylene action, 2,5-norbornadiene (NBD) inhibited seed germinationand decreased α-amylase activity. The inhibitory action of JA-Me onAmaranthus caudatus seed germination is associated with theinhibition of α-amylase activity. Exogenous GA3 and ethylenecontrol both α-amylase activity and seed germination in the presence of JA-Me.
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Ethylene biosynthesis in Amaranthus caudatus seeds in response to methyl jasmonate
Plant Growth Regulation, 1999Co-Authors: J. Kępczyński, Bożena Białecka, Ewa KępczyńskaAbstract:Methyl jasmonate (JA-Me) at 10−3 M completely inhibited Amaranthus caudatus seed germination. Exogenous ethylene could totally reverse this inhibition. The inhibitor of ethylene action, 2,5-norbornadiene (NBD), increased the sensitivity of seeds to JA-Me. Methyl jasmonate inhibited ethylene production and also decreased both 1-aminocyclopropane-1-carboxylic acid (ACC) and malonyl ACC (MACC) content. Likewise, ACC oxidase activity in vivo was decreased by jasmonate. Similarly ACC oxidase activity in vitro isolated from seeds incubated in the presence of JA-Me was lower than that isolated from untreated seeds.
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Stimulatory effect of ethephon, ACC, gibberellin A3 and A4+7 on germination of methyl jasmonate inhibited Amaranthus caudatus L. seeds
Plant Growth Regulation, 1994Co-Authors: J. Kępczyński, Bożena BiałeckaAbstract:Methyl jasmonate (JA-Me) inhibited or retarded germination of Amaranthus caudatus seeds in darkness at 24°C, Ethephon, ACC and gibberellins (GA3 or GA4+7) partially or completely reversed this inhibition depending on the concentration of JA-Me applied. Both ethephon and the gibberellins were more effective than ACC. Both GA3 and GA4+7 enhanced the stimulatory effect of ethephon or ACC on germination of seeds inhibited by JA-Me.