摘要： 通过对瓜尔豆生长不同生育期(幼苗初花期、盛花结荚期、鼓粒期)进行弱光处理(30%自然光),以进一步了解瓜尔豆对弱光的敏感时期及其对弱光的生理反应,试验结果表明:不同生育期弱光都会导致瓜尔豆的株高增加,茎粗降低,叶绿素含量增加,叶面积减小,叶片及植株干、鲜质量减少。同时,弱光处理导致瓜尔豆叶片中生长素(IAA)、赤霉素(GA)和细胞分裂素(CTK)含量下降,而脱落酸(ABA)含量增加,不同生育期处理变化不同。

关键词: 生育期, 弱光, 生长发育, 内源激素

Abstract: The plant growth and endohormone contents of guar(Cyamopsis tetragonoloba L.),which cultivated underlow light intensity stress (30 % natural light intensity)at seedlings stage,blooming and pod formation stage,and seedingstage ,were studied in this experiment for the purpose of elucidating the effects of low light (LL)on guar,concluded thesensitive stage and its physiological responses to shading.The results showed that regardless to any growth stage,low lighttreatments could lead to an increase in elongation growth and chlorophyll contents,and decrease in stem diameter,leafarea and the weight of leaf and plant fresh weight and dry matter.Meanwhile,it also showed that contents of IAA ,GA andCTK were decreasing and contents of ABA were increasing,and the degree of change was different in different growthstages.

Key words: Growthstages, Shading, Growthanddevelopment, Endohormonecontents

中图分类号: 

• S52.01