核农学报2011，Vol.25Issue(3)：582-587,6.
钙对低温高光锻炼下烤烟幼苗光合的促进效应
PROMOTING EFFECTS OF CALCIUM ON PHOTOSYNTHESIS OF TOBACCO SEEDINGS UNDER CHILLING AND HIGH LIGHT ACCLIMATION
摘要
Abstract
The effects of calcium chloride on photosynthesis characteristic and chlorophyll fluorescence characteristic of flue-curing tobacco seedlings under chilling and high light acclimation were studied, and the seedlings of flue-curing tobacco variety Longjiang 911 was grown as material. The results showed that the net photosynthetic rates(Pn) , stomatal conductance(Gs) , maximal photochemical efficiency of PSⅡ(Fv/Fm) and actual photochemical efficiency of PS]I( ΦPSⅡ) significantly decreased under the chilling and high light acclimation compared with non-acclimation seedlings, suggesting that the stress resistance was strengthened while photosynthetic capacity reduced. Pn, Fv/Fm and ΦPSⅡof flue-curing tobacco seedlings increased to various degrees at the later stage of acclimation, which implied that the flue-curing tobacco seedlings leaves protected against damage of photosynthetic apparatus by suffering photo-inhibition under temperature and light intensity conducted in the experiment. The carbon dioxide compensation point(CCP) significantly decreased, while Pn, Gs, Fv/Fm,ΦPSⅡ, apparent quantum yield(AQY) , photosynthetic rate saturated light (Pmax) , light compensation points (LCP), light saturation point (LSP), carbolyation efficiency (CE) and photosynthetic rate at saturated carbon dioxide (Jmax) of flue-curing tobacco seedlings leaves were significantly higher than that of acclimation seedlings after spraying calcium chloride. It is concluded that calcium chloride could alleviate damage of the photosynthetic apparatus of tobacco seedlings leaves under chilling and high light acclimation.关键词
烤烟/低温高光锻炼/氯化钙/光合特性Key words
flue-curing tobacco/ chilling and high light acclimation/ calcium chloride/ photosynthesis characteristic引用本文复制引用
张会慧,包卓,许楠,王鹏,尹鹏达,孙广玉..钙对低温高光锻炼下烤烟幼苗光合的促进效应[J].核农学报,2011,25(3):582-587,6.基金项目
国家自然科学基金(30771746,31070307),黑龙江省烟草专卖局项目(2007,2009) （30771746,31070307）
