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Plant Growth Regulators Influence 14 CO 2 Assimilation and Translocation of Assimilates in Indian Mustard

Plant Growth Regulators Influence 14 CO 2 Assimilation and Translocation of Assimilates in Indian... Effect of plant growth regulators Naphthalene acetic acid (NAA), Gibberellic acid (GA3) and Kinetin on 14CO2 assimilation, partitioning of 14C into major biochemical fractions and translocation of assimilates was studied in different parts of Indian Mustard (Brassica juncea) at late ripening stage. Leaves, stem and pod walls are photosynthetically active and are important sources for seed filling. NAA and kinetin increased the 14CO2 assimilation rate in all the three photosynthetically active parts. All the three growth regulators increased the export of 14assimilates out of source organs and increased the movement of assimilates into the reproductive parts (pods). The increased movement of photoassimilates into the developing pods may be due to the stimulation of sink activity by the growth regulators which resulted in the higher demand for photoassimilates. It was suggested that growth regulators may increase yield by altering distribution of assimilates in the mustard plants. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Agronomy and Crop Science Wiley

Plant Growth Regulators Influence 14 CO 2 Assimilation and Translocation of Assimilates in Indian Mustard

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References (25)

Publisher
Wiley
Copyright
Copyright © 1992 Wiley Subscription Services, Inc., A Wiley Company
ISSN
0931-2250
eISSN
1439-037X
DOI
10.1111/j.1439-037X.1992.tb00992.x
Publisher site
See Article on Publisher Site

Abstract

Effect of plant growth regulators Naphthalene acetic acid (NAA), Gibberellic acid (GA3) and Kinetin on 14CO2 assimilation, partitioning of 14C into major biochemical fractions and translocation of assimilates was studied in different parts of Indian Mustard (Brassica juncea) at late ripening stage. Leaves, stem and pod walls are photosynthetically active and are important sources for seed filling. NAA and kinetin increased the 14CO2 assimilation rate in all the three photosynthetically active parts. All the three growth regulators increased the export of 14assimilates out of source organs and increased the movement of assimilates into the reproductive parts (pods). The increased movement of photoassimilates into the developing pods may be due to the stimulation of sink activity by the growth regulators which resulted in the higher demand for photoassimilates. It was suggested that growth regulators may increase yield by altering distribution of assimilates in the mustard plants.

Journal

Journal of Agronomy and Crop Science – Wiley

Published: Mar 1, 1992

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