YANG Tian-hui,LI Mei-qin,LYU Jin-fu,et al.Effect of Ultraviolet B Irradiation in Seedling Stage on Growth and Physiological Activity of Luffa Leaf[J].Northern Horticulture,2014,38(20):36-39.
苗期紫外线B照射对丝瓜叶片生长和生理活性的影响
- Title:
- Effect of Ultraviolet B Irradiation in Seedling Stage on Growth and Physiological Activity of Luffa Leaf
- 文章编号:
- 1001-0009(2014)20-0036-04
- Keywords:
- luffa; ultraviolet B; photosynthetic parameter; enzymatic activity
- 分类号:
- S 642.4；S 124+.2
- 文献标志码:
- A
- 摘要:
- 以‘维科1号’丝瓜为试材，研究了不同紫外线B（UV-B）处理对苗期丝瓜生长和生理活性的影响。结果表明：适量的UV-B照射可以起到促进丝瓜植株生长，提高水分利用效率的作用；持续的UV-B照射会抑制丝瓜植株生长，降低丝瓜叶片的净光合速率、气孔导度，加重PSII光抑制，同时可以提高叶片水分利用效率和叶片抗氧化酶活性；而只在苗期进行10 d的UV-B照射，可以明显促进植株生长，提高成苗的叶片净光合速率，但同时降低气孔导度，从而大幅提高叶片的光合水分利用效率，同时苗期UV-B处理明显增加了成苗叶片抗氧化酶活性，从而提高成苗叶片的光抑制抗性；试验表明苗期适量的UV-B照射是促进丝瓜植株生长，同时减少水分消耗的经济、有效的方法。
- Abstract:
- Taking ‘Weike No.1’luffa as materials,effect of ultraviolet B(UVB) irradiation in seedling stage on growth and photosynthetic activity of luffa leaf were studied.The results showed that,properly UV-B irradiation could induce the loofah plant growth,and increase the water use efficiency；UV-B irradiation could inhibit sustained loofah plant growth,reduce the net photosynthetic rate and stomatal conductance of the luffa leaf,and aggravated photo inhibition of PSII,at the same time it could improve the water use efficiency and antioxidant enzyme activities of leaves.And 10 days of UV-B exposure only in the seedling stage,could significantly promote plant growth,improve the net photosynthetic rate of seedling leaf,but also reduce stomatal conductance,thereby significantly improve leaf photosynthetic water use efficiency at seedling stage,while UV-B treatment significantly increased the seedling leaf antioxidant enzyme activity,thereby improving seedling leaves photo inhibition resistant.It showed that,moderate UV-B exposure was a economic effective method that could promote the luffa plant growth,and reduce water consumption.
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备注/Memo
第一作者简介：杨天慧（1983-），女，硕士，讲师，现主要从事蔬菜遗传育种与生理栽培的教学与科研工作。E-mail:yangth1230@163.com.
责任作者：李美芹（1968-），女，博士，副教授，现主要从事生物学与蔬菜遗传育种等研究工作。E-mail:mqli901@126.com.
基金项目：山东省高等学校科技计划资助项目（J12LE56）；潍坊市科技计划发展资助项目（201301157）；潍坊科技学院科技计划资助项目（W13K001）。
收稿日期：2014-05-24