摘要
[目的]研究不同光照强度对苦荞主要生理特性的影响。[方法]以出苗后19 d的苦荞为试材,设置3种遮光方法(自然光强的80%、60%、40%),进行遮光处理,100%光强为对照,遮光后5 d在不同生育时期分别测定各处理叶片叶绿素含量、净光合速率及茎叶和种子黄酮含量的变化,并通过SSR法进行分析比较。[结果]苦荞遮光后较短时间内,叶片叶绿素指数随光强的增加而降低,遮光后较长时间内,叶片叶绿素指数随光强的减弱而减弱;在现蕾期、开花结实期和成熟期,光照越强,苦荞叶片的净光合速率和叶、茎的黄酮含量越高,表现为:CK>80%光强>60%光强>40%光强,成熟期苦荞籽粒黄酮含量变化与此一致。[结论]光照强弱对苦荞的叶绿素指数、净光合速率和黄酮含量均具有较大的影响。
[ Objective ] The purpose was to study the effects of different light intensity on buckwheat. [ Method ] With buckwheat after seeding emergence for 19 d as the tested material, 3 shading treatments with the light intensity of 80%, 60% and 40% of nature light were sep up to treat on the buckwheat seedlings, with light intensity of 100% as CK. After the shading treatments for 5 d, the leaf chlorophyll contents index, the net photosynthetic rates and the flavone contents in stem-leaves and seeds of the buckwheat during different growth stages were measured, and they were analyzed and compared by SSR. [ Result ] The chlorophyll exponent of buckwheat leaves was reduced with the increase of light intensity in short time after shading treatments and it was weaken with the reduction of light intensity. The stronger the light in- tensity was, the higher the net photosynthetic rate in leaves and the flavone content in stem-leaves were in squaring, blooming and beating and mature stages. Their performance for different shading treatments in order was CK 〉 80% light intensity 〉 60% light intensity 〉 40% light intensity. The flavone content in seeds of buckwheat had consistent change like this in mature stage. [ Conclusion ] The light intensity had greater effect on the leaf chlorophyll exponent, net photosynthetic rate and flavone content in buckwheat
出处
《安徽农业科学》
CAS
北大核心
2009年第21期9920-9921,9924,共3页
Journal of Anhui Agricultural Sciences
基金
四川省麦类作物育种攻关项目(2006yzgg-3)
关键词
苦荞
遮光
叶绿素
光合速率
黄酮
Buckwheat
Shading
Chlorophyll
Photosynthetic rate
Flavone
