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Plant Growth Regulators Influence 14 CO 2 Assimilation and Translocation of Assimilates in Indian Mustard
Author(s) -
Subrahmanyam D.,
Rathore V. S.
Publication year - 1992
Publication title -
journal of agronomy and crop science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.095
H-Index - 74
eISSN - 1439-037X
pISSN - 0931-2250
DOI - 10.1111/j.1439-037x.1992.tb00992.x
Subject(s) - kinetin , gibberellic acid , brassica , biology , chromosomal translocation , assimilation (phonology) , point of delivery , growth regulator , plant growth , photosynthesis , mustard plant , auxin , botany , agronomy , germination , biochemistry , tissue culture , linguistics , philosophy , gene , in vitro
Effect of plant growth regulators Naphthalene acetic acid (NAA), Gibberellic acid (GA 3 ) and Kinetin on 14 CO 2 assimilation, partitioning of 14 C 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 14 CO 2 assimilation rate in all the three photosynthetically active parts. All the three growth regulators increased the export of 14 assimilates 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.