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14 CO 2 Assimilation and Translocation of 14 C‐Photosynthates by Different Parts of Indian Mustard ( Brassica juncea L.)
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.tb01023.x
Subject(s) - brassica , biology , point of delivery , chromosomal translocation , ripening , main stem , botany , assimilation (phonology) , agronomy , gene , linguistics , biochemistry , philosophy
Abstract The role of leaves, stem and reproductive parts in 14 CO 2 fixation and subsequent photosynthate translocation was studied in Indian mustard ( Brassica juncea L.) at three growth stages. The data indicated that leaves, stem and pods are important sources of photosynthates for seed filling. At bud emergence stage leaves are the principle site of 14 CO 2 , fixation. The contribution of leaves declines at subsequent stages, where as the contribution of pod walls increased from bud emergence stage to ripening stage. The contribution of the stem remains more or less constant at all three growth stages studied. Although stem can fix 14 CO 2 , at bud emergence and flowering stages it imported 14 C‐photosynthates from leaves. However, stem exported photosynthates during subsequent growth stages.