摘要
以烤烟（ＮｉｃｏｔｉａｎａｔａｂａｃｕｍＬ．）品种ＮＣ８９为材料，在盆栽条件下研究了干旱胁迫对烤烟叶片水分代谢的影响。结果表明，在干旱胁迫下烤烟叶片束缚水含量上升，气孔阻力增大，叶片相对含水量和自由水含量下降，叶片水势降低，蒸腾强度减弱，烟株对水分的蒸散量减少。而且上述指标均随土壤水分的变化而变化，表明它们对干旱胁迫的反应都很敏感。
The influence of drought stress on water metabolism in flue-cured tobaccoleaves were studied with cultivar NC89 ( Nicotiana tabacum L.)under pot experiment. The results showed that the bound water(BW)content and stomatal resistance(r_s)influe-cured tobacco leaves increased,while the relative water content(RWC),free water(FW)content,leaf water potential(ψ_w),and the rate of transpiration in the leaves de-creased under drought stress. Therefore,the amount of water evapotranspiration of tobac-co plants declined.Moreover,the above- mentioned indexes changed with soil water condi-tions,which indicated that the responses of these indexes to drought stress were sensitive.
出处
《河南农业大学学报》
CAS
CSCD
1994年第1期50-54,共5页
Journal of Henan Agricultural University
关键词
干旱胁迫
烤烟
水分代谢
drought stress
flue-cured tobacco
water metabolism
