Open AccessBiochemical Characterization on Photosynthetic Activities during Dark Incubated Senescence of Wheat Primary Leaves by Gibberellic Acid
Author(s) -
G. Fareeda,
S. D. S. Murthy
Publication year - 2019
Publication title -
asian journal of biochemistry, genetics and molecular biology
Language(s) - English
Resource type - Journals
ISSN - 2582-3698
DOI - 10.9734/ajbgmb/2019/v2i430067
Subject(s) - photosynthesis , senescence , gibberellic acid , thylakoid , crop , incubation , biology , chemistry , horticulture , agronomy , botany , chloroplast , biochemistry , gene , germination , microbiology and biotechnology
In annual crop plants like maize, rice and wheat etc. Senescence limits crop yields of annual crops like maize rice and wheat. Delayed leaf senescence is a desirable agronomic trait to improve crop yield. In this study 10 µM GA reduced the loss of wheat primary leaves under incubated dark conditions. GA reduced the loss of pigments, proteins, electron transport activities, spectral properties. The restoration of WCE activity by GA was closely associated with the restoration of PS II activity compared to that of PS I. GA treated leaf thylakoid membranes showed an increase in absorption at 680 nm moderate increase at 480 nm and 440 nm at 72 h during dark incubation. GA protected the degradation of water oxidation complex polypeptides (33, 23, 17 KDa) of PS II and slightly protected the PS I polypeptides.