红花玉蕊对淡水全淹胁迫的生长及生理响应  

Growth and Physiological Response of Barringtonia acutangula to Freshwater Flooding Stress

作　　者：梁芳[1] 黄寿镕 於艳萍[3] 黄秋伟[3] 张继[3] 檀小辉[3] Liang Fang;Huang Shourong;Yu Yanping;Huang Qiuwei;Zhang Ji;Tan Xiaohui(Yulin Normal University, Yulin Guangxi 537000, China;Guangzhou Pubang Garden Co. Ltd., Guangzhou Guangdong 510600, China;Guangxi Subtropical Crops Research Institute, Nanning Guangxi 530001, China)

机构地区：[1]玉林师范学院,广西玉林537000 [2]广州普邦园林股份有限公司,广东广州510600 [3]广西壮族自治区亚热带作物研究所,广西南宁530001

出　　处：《西南林业大学学报（自然科学）》2019年第3期18-25,共8页Journal of Southwest Forestry University：Natural Sciences

基　　金：国家自然科学基金项目(31660226)资助;广西高校中青年教师基础能力提升项目(KY2016YB361)资助

摘　　要：为揭示红花玉蕊对淹水胁迫的生理响应机制,获得红花玉蕊适生的淹水时长范围,模拟半日潮,在温室分别以不同淹水时长对红花玉蕊幼苗进行完全淹没胁迫处理,测定了植株的生长指标及生理指标。结果表明:淡水全淹处理28 d后,红花玉蕊幼苗全部是绿叶株,存活率为100%。不同淹水时长对红花玉蕊幼苗株高、地径、叶片的总增长量和增长速率的影响差异不显著,不同淹水天数对幼苗株高地径、叶片的增长速率影响差异极显著。随着淹水时长的增加,幼苗叶片在淹水时长为0～6 h/d时超氧化物歧化酶活性呈平稳趋势,过氧化物酶活性和丙二醛含量先升高后下降,较CK差异均不显著,但脯氨酸含量则显著下降,在淹水4、6 h/d时较CK呈显著差异;淹水时长增加至8～12 h/d时,超氧化物歧化酶活性显著上升,在淹水10 h/d达到最大值且较CK呈极显著差异,脯氨酸含量在淹水10、12 h/d时较CK呈显著差异。可见,淡水全淹0～12 h/d并未影响红花玉蕊植株的生长发育进程,红花玉蕊幼苗在淡水全淹环境下淹水胁迫环境的临界时间为8 h/d,最小适生淹水时长为0～12 h/d。In order to reveal the physiological response mechanism of Barringtonia acutangula to flooding stress, the range of flooding duration of B. acutangula was obtained. Half-day tide was simulated. B. acutangula seedlings were completely submerged under different flooding time in the greenhouse, and the growth index and physiological indexes of the plants were determined. The results show that after 28 days of fresh water flooding treatment, the seedlings of B. acutangula were all green-leaved plants, and the survival rate is 100%. The effects of different flooding duration on plant height, ground diameter, total leaf growth and growth rate are not significant. The effects of different flooding days on plant height, ground diameter and leaf growth rate are extremely significant. With the increase of flooding time, the SOD activity of seedling leaves show a steady trend when the flooding time is 0-6 h/d. POD activity and MDA content increase at first and then decrease. The difference of POD activity and MDA content is not significant compared with CK, but proline content decreased significantly. The SOD activity increases significantly when the flooding time is increased to 8-12 h/d, and reaches the maximum at 10 h/d. The content of proline is significantly different from CK at 10 h/d and 12 h/d of flooding. It can be seen that fresh water flooding for 0-12 h/d do not affect the growth and development of B. acutangula stamen plants. The critical time of drowning stress for B. acutangulaseedlings is 8 h/d under full-flooded fresh water environment, and the minimum suitable time for drowning is 0-12 h/d.

关 键 词：红花玉蕊 潮汐系统 淹水胁迫 生理响应 

分 类 号：Q945[生物学—植物学]