| 弱光条件下不同基因型辣椒幼苗光合与生长的差异 |
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| 引用本文： | 眭晓蕾,张宝玺,张振贤,毛胜利,王立浩.弱光条件下不同基因型辣椒幼苗光合与生长的差异[J].农业工程学报,2005,21(Z2):41-44. |
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| 作者姓名： | 眭晓蕾 张宝玺 张振贤 毛胜利 王立浩 |
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| 作者单位： | 1. 中国农业大学农学与生物技术学院,北京,100094
2. 中国农业科学院蔬菜花卉研究所,北京,100081 |
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| 基金项目： | 国家“863”计划项目(2002AA244011-1)，农业部蔬菜遗传与生理重点实验室资助项目 |
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| 摘 要： | 利用遮光方式,使光照强度降低65%~70%,以研究弱光对不同基因型辣椒幼苗光合、蒸腾以及生长形态指标的影响。结果表明:弱光环境下辣椒净光合速率、蒸腾速率和水分利用效率下降,并且净光合速率的下降是非气孔限制的结果。弱光下辣椒幼苗同化物合成与积累受到抑制,表现为叶片数减少,高粗比增加,根冠比、比叶鲜样质量、比叶干样质量、全株干样质量和壮苗指数下降。弱光使辣椒叶片叶绿素含量增加,叶绿素a/b比值下降,叶片含水量上升。小果型辣椒的耐弱光性普遍强于大果型甜椒,并且弱光环境下相对壮苗指数较高,以及净光合速率下降较少的辣椒或甜椒,具有耐弱光的优势。
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| 关 键 词： | 辣椒 弱光 净光合速率 相对壮苗指数 |
| 文章编号： | 1002-6819(2005)S-0041-04 |
| 修稿时间： | 2005年9月30日 |
Differences of photosynthesis and growth in seedlings of different peppers under weak light |
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| Sui Xiaolei,Zhang Baoxi,Zhang Zhenxian,Mao Shengli,Wang Lihao.Differences of photosynthesis and growth in seedlings of different peppers under weak light[J].Transactions of the Chinese Society of Agricultural Engineering,2005,21(Z2):41-44. |
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| Authors: | Sui Xiaolei Zhang Baoxi Zhang Zhenxian Mao Shengli Wang Lihao |
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| Institution: | Sui Xiaolei~1,Zhang Baoxi~ |
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| Abstract: | This paper studied the effects of weak light(30%~35% light intensity of the control light intensity) on photosynthesis,transpiration and growth morphological indexes in seedlings of different peppers.The result showed that under weak light environment,net photosynthetic rate,transpiration rate and water use efficiency decreased.The decrease of net photosynthetic rate was considered as a result of non-stomata restriction.The synthesis and accumulation of assimilate were significantly inhibited under weak light.It can be seen that weak light led to the decrease of leaf numbers,root/shoot ratio,vital leaf mass, specific leaf mass,total dry mass and healthy indexes and the increase of plant height/stem diameter ratio.Under weak light the chlorophyll a/b ratio declined but the chlorophyll contents and leaf water content increased. Weak light-tolerance of hot pepper was generally stronger than sweet pepper.Pepper may possess potential weak light-tolerance which grown under weak light with higher relative healthy index and less decreasing net photosynthetic rate. |
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| Keywords: | pepper weak light net photosynthetic rate relative healthy index |
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