2006•Nanjing Nongye Daxue xuebaoRequires access

Effects of 6-benzyladenine and abscisic acid on the photosynthetic function decline in tobacco

Jiang Li, Kong Xiao-wei

Abstract

Effects of 6-benzyladenine(6-BA)and abscisic acid(ABA)on photosynthetic function decline in two genotypes tobacco(Nicotiana tabacum L.'NC89''JYH')leaves were studied.The instantaneous apparent photosynthetic rate(IAPS),chlorophyll content,the activities of whole electron transport chain of chloroplast and ribulose-1,5-bisphosphate carboxylase(RuBPCase)of leaves were increased with 6-BA treatment.6-BA treatment extended the active photosynthesis duration,increased the decline ratio of electron transport and carbon assimilation,and also delayed photosynthetic function decline of leaves.The results were reversed in leaves with ABA treatment.JYH was more sensitive than NC89 under 6-BA and ABA treatments.

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Key concepts: Photosynthesis, Abscisic acid, RuBisCO, Nicotiana tabacum, Chloroplast, Botany, Chlorophyll, Ribulose