2007•Shenyang Nongye Daxue xuebaoRequires access
Effect of KHCO_3 and NaHSO_3 on Photosynthesis of Eggplant Seedling
FU Shu-jie
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Abstract
Effect of KHCO3 and NaHSO3 and their mixtures on photosynthesis of eggplant seedlings was studied.The results showed that KHCO3,NaHSO3 and their mixtures could enhance photosynthetic rate of eggplant seedlings distinctly,raize light saturation point,CO2 saturation point,apparent quantum yield,carboxylation effciency and decrease light compensate point,CO2 compensate point.There was PEPC in leaves of eggplant seedlings.KHCO3 could enchance RuBPCase activity.NaHSO3 could enhance not only RuBPCase but also RuBPOase and the ratio of RuBPCase activity to RuBPOase activity.NaHSO3 could promote electron transport activity of PSⅠ,PSⅡand whole photosynthetic chain.KHCO3 could also promote electron transport activity,but the effect of promoting of photosynthesis was lower compared with NaHSO3.KHCO3,NaHSO3 and their mixtures could increase dry weight of roots,stems,leaves.For factors of improving photosynthesis,K+,HCO3-and HSO3-could improve photosynthetic rate.HSO3-was a primary factor could improve electron transport activity of PSⅠand whole photosynthetic chain.K+,HCO3-and HSO3-that could improve electron transport activity of PSⅡ.HCO3-could improve PEPCase activity.HSO3-could improve RuBPCase activity and RuBPOase activity.K+ and HCO3-could increase RuBPCase activity.