Effects of Shading on Growth and Photosynthetic Characteristics of Eggplant Seedling

doi:10.7668/hbnxb.2010.03.023

Abstract

Abstract: Effects of shading on growth and photosynthesis were conducted in eggplant seedling.The results showed that plant height was higher,but stem diameter, specific leaf weight( SLW) and SPAD value under shading condition were lower than those of control.Light saturation point( LSP), light compensation point( LCP), photosynthetic rate at light saturation point and apparent quantum yield( AQY) significantly became lower under low light stress.The curves of diurnal variation in net photosynthetic rate( Pn) have two peaks( at 9: 00 and 11: 00),a midday depression under full sunlight; whereas under shading treatment, the curve has only one peak at 11: 00.Leaf stomata1 conductance( Gs), the transpiration rate( Tr),water use efficiency( WUE) and stomatal limitation( Ls) were decreased under shading,while intercellular CO²

Key words: Shading, Eggplant, Growth, Photosynthetic characteristics

CLC Number:

S641.1

WU Xue-xia, ZHA Ding-shi. Effects of Shading on Growth and Photosynthetic Characteristics of Eggplant Seedling[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2010, 25(3): 102-107. doi: 10.7668/hbnxb.2010.03.023.

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