MIAO Jin-shan,LIU Jie,LI Yun-ling,et al.Effect of Photosynthetic Bacterial on Photosynthesis and Antioxidant Enzyme System of Watermelon Seedlings in Early Spring[J].Northern Horticulture,2014,38(21):42-44.
不同浓度光合菌对早春茬西瓜幼苗光合功能和抗氧化系统的影响
- Title:
- Effect of Photosynthetic Bacterial on Photosynthesis and Antioxidant Enzyme System of Watermelon Seedlings in Early Spring
- 文章编号:
- 1001-0009(2014)21-0042-03
- Keywords:
- watermelon; photosynthetic bacteria; low temperature stress
- 分类号:
- S 652
- 文献标志码:
- B
- 摘要:
- 以‘潍科3号’西瓜品种为试材，在日光温室环境下采用叶面喷施法，研究了不同浓度光合菌对低温逆境下西瓜幼苗叶片光合功能及抗氧化系统的影响。结果表明：西瓜苗期叶面喷施光合菌1×109～4×109CFU/mL，明显减轻了低温胁迫下叶绿素的分解，有效缓解了低温对光合系统及抗氧化系统的伤害，保护了幼苗的膜系统，增强了西瓜幼苗对低温逆境的适应能力，其最适宜的浓度为4×109CFU/mL。但叶面喷施8.0×109 CFU/mL光合菌却对西瓜幼苗有一定毒害作用。
- Abstract:
- Taking ‘Weike No.3’yellow-skin watermelon as materials，the effects of photosynthetic bacteria on photosynthesis and antioxidant enzyme activities in leaves were studied by foliage sparaying method.The results showed that,spraying 1×109-4×109 CFU/mL PSB on leaves of watermelon decreased the decomposition of chlorophyll to alleciate the damage of photosystem and antioxidant enzyme system，effectively protect the membrane system under low temperature stress，greatly improve the resistance of watermelon.The optimal concentration to spray on leaves of watermelon was 4×109 CFU/mL PSB，but 8.0×109 CFU/mL PSB would be toxic to watermelon seedlings.
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备注/Memo
第一作者简介：苗锦山(1972-)，男，博士，副教授，现主要从事蔬菜育种与栽培技术等研究工作。E-mail:lnmjs@163.com.
基金项目：国家星火计划资助项目（2011GA740071）；潍坊科技学院自然科学重大专项资助项目（w13k002）。
收稿日期：2014-05-22