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| 光合菌对黄瓜光合及抗氧化同工酶的影响 | |
| 引用本文： | 宋兴舜,任静,刘雪梅,马双,杨传平.光合菌对黄瓜光合及抗氧化同工酶的影响[J].植物学通报,2009,44(5):587-593. |
| 作者姓名： | 宋兴舜 任静 刘雪梅 马双 杨传平 |
| 作者单位： | 1. 东北林业大学生命科学学院遗传学科,哈尔滨,150040;林木遗传改良与生物技术教育部重点实验室(东北林业大学),哈尔滨,150040 2. 东北农业大学成栋学院生物食品系,哈尔滨,150030 3. 东北林业大学生命科学学院遗传学科,哈尔滨,150040 4. 林木遗传改良与生物技术教育部重点实验室(东北林业大学),哈尔滨,150040 |
| 基金项目： | 国家自然科学基金，黑龙江省博士后基金，东北农业大学青年科研基金 |
| 摘 要： | 以2种基因型的黄瓜（Cucumis sativus）为材料，研究光合菌（PSB）的喷施对植物生物量、净光合速率（Pn）、叶片PSII的最大光化学效率（Fv／Fm）及抗氧化同工酶代谢的影响。结果表明，喷施PSB均能诱导2种基因型黄瓜的生物量显著增加，并伴随Pn的显著提高。但是，2种基因型黄瓜的Fv/Fm并不受PSB喷施的影响：PSB能使总过氧化物歧化酶（soo）和抗坏血酸过氧化酶（APX）活性提高，并使它们的多数同工酶的活性上调，这些同工酶活性的增加在叶绿体中表现更为明显（如Cu／Zn-SOD、Fe-SOD和sAPX）。研究结果表明，PSB能通过增强黄瓜抗氧化酶体系的活性改善植株的抗氧化能力，从而在植株的生长和光合作用方面起到促进作用。 |
| 关 键 词： | 黄瓜 同工酶 光合作用 光合菌 |
Effects of Photosynthetic Bacteria on Photosynthesis and Antioxidative Isoenzymes in Cucumber (Cucumis sativus) |
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| Institution: | Xingshun Song ,Jing Ren, Xuemei Liu,Shuang Ma ,Chuanping Yang(1.Department of Genetics, College of Life Science, Northeast Forestry University, Harbin 150040, China; 2Key Laboratory of Forest Tree Genetic Improvement and Biotechnology (Northeast Forestry University), Ministry of Education, Harbin 150040, China; 3Depart ment of Biology and Food Science, College of Cheng Dong, Northeast Agricultural University, Harbin 150030, China) |
| Abstract: | We examined the net photosynthetic rate （Pn）, the maximal photochemical efficiency of PSII （Fv/Fm） and the activities of antioxidant isoenzymes in cucumber （Cucumis sativus） with or without photosynthetic bacteria （PSB） application. PSB spraying resulted in a significant increase in fresh weight and leaf area for both genotypes of cucumber plants, accompanied by a marked increase of Pn. However, Fv/Fm showed negligible changes. Exogenous PSB also increased activities of total superoxide dismutase （SOD） and ascorbate peroxidase （APX）, and a general increase of their isoenzymes. The increased level in Cu/Zn-SOD, Fe-SOD and stroma APX （sAPX） was most significant in chloroplasts. These results implied that PSB played a favorable role in growth and photosynthesis and improved hardiness in cucumber by enhancing antioxidant enzyme activities. |
| Keywords: | Cucumis sativus isoenzyme photosynthesis photosynthetic bacteria |
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