紫外线B照射提高丝瓜叶片光合机构干旱抗性  

Effects of Ultraviolet B Irradiation on the Drought Resistance of Photosynthetic Mechanism in Leaves of Luffa

作　　者：杨天慧[1] 张子山[2] 刘永光[1] 李美芹[1] 王馨笙 吕金浮[1] YANG Tianhui;ZHANG Zishan;LIU Yongguang;LI Meiqin;WANG Xinsheng;LYU Jinfu(Institute of Horticultural Facilities,Weifang University of Science&Technology,Shouguang,Shandong 262700;College of Life Sciences,Shandong Agricultural University,Tai′an,Shandong 271000;Shandong Association for Science&Technology,Jinan,Shandong 250001)

机构地区：[1]潍坊科技学院设施园艺研究院,山东寿光262700 [2]山东农业大学生命科学学院,山东泰安271000 [3]山东省科学技术协会,山东济南250001

出　　处：《北方园艺》2021年第16期44-48,共5页Northern Horticulture

基　　金：国家自然科学基金青年基金资助项目(31701966);山东省农业重大应用技术创新资助项目(SD2019ZZ004);山东省高校设施园艺实验室资助项目(2018YY009)。

摘　　要：以"天潍1号"丝瓜为试材,研究了紫外线B(UVB)照射对丝瓜干旱抗性的影响,以期为提高丝瓜植株的干旱抗性提供经济有效的方法。结果表明:干旱胁迫下,经过UVB照射的丝瓜植株维持了较高的光合速率,更通畅的电子传递,以及较低的活性氧含量。UVB照射可在不影响光合碳同化的情况下降低蒸腾速率,从而在干旱处理下保持更高的土壤含水量。在土壤含水量相同的情况下,UVB照射可通过维持较高的光合速率,避免电子传递受阻,从而降低活性氧的产生速率,避免细胞遭受严重的氧化伤害。The effect of ultraviolet B(UVB)irradiation on the drought resistance of luffa was studied with the‘Tianwei No.1’luffa as material,in order to provide an economical and effective method for improving the drought resistance of luffa plants.The results showed that under drought stress,the luffa plants irradiated by UVB maintained a high net photosynthetic rate,a high electron transfer activity,and a lower content of reactive oxygen species.UVB irradiation could reduce the transpiration rate without affecting photosynthetic carbon assimilation,thereby maintaining a higher soil water content under drought treatment.In the case of the same soil water content,UVB irradiation could also maintain high net photosynthetic rate,prevent the blocking of electrons transfer,thereby reduced the generation rate of reactive oxygen species,consequencely prevented the cells from suffering severe oxidative damage.

关 键 词：丝瓜 紫外线B 光合速率 干旱 抗性 

分 类 号：S642.4[农业科学—蔬菜学]