A Study on Photosynthesis in Leaves of Haploid and Doubled Haploid Pepper

doi:10.3321/j.issn:1000-7091.2001.03.011

Abstract

Abstract: Photosynthesis of haploid and doubled haploid pepper derived from microspore(Capsicum annuum L.) was investigated.The net photosynthetic rate(Pn) of haploid plant was lower than that of doubled haploid in any photo flux density(PFD).Under lower light,the stomatal factor was the main cause of the Pn decrease in haploid plant leaves,whereas under normal light,the non stomatal factors were the main causes.A remarkable photoinhibition of photosynthesis was observed in the haploid plant leaf under high light conditions.When plants were exposed to normal light,Pn,stomatal conductance(Gs),apparent quantum efficiencies(AQE) and carboxylation efficiencies(CE) in haploid leaves were lower than those in doubled haploid,but the intercellular CO 2 compensation point(Γ) and light compensation point of haploid plant leaves were higher than those of doubled haploid.These might be the important features of the differences between haploid and doubled haploid plant.

Key words: Pepper, Photosynthesis, Haploid, Doubled haploid

CLC Number:

S601

DU Shengli, WEI Huijun, WEI Aimin, WANG Yanfei, PANG Jinan. A Study on Photosynthesis in Leaves of Haploid and Doubled Haploid Pepper[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2001, 16(3): 52-55. doi: 10.3321/j.issn:1000-7091.2001.03.011.

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