文章摘要
盐度及钒酸钠胁迫对红毛菜光合生理的影响
Effects of Salinity and Na3VO4 Stress on Photosynthetic Physiology of Bangia
投稿时间:2019-06-28  修订日期:2019-07-29
DOI:
中文关键词: 红毛菜  盐度  钒酸钠  PSII原初光能转化效率  表观光合速率  呼吸耗氧速率
英文关键词: Bangia  Salinity  Na3VO4  Fv/Fm  Pn  Rd
基金项目:国家自然科学基金(31672630)、国家重点研发计划(2018YFD0901500)、山东省农业良种工程(南种北繁)项目(2017LZN013)和现代农业产业技术体系(CARS-50)
作者单位E-mail
魏家慧 上海海洋大学 997427166@qq.com 
李晓蕾 中国水产科学研究院黄海水产研究所  
汪文俊 中国水产科学研究院黄海水产研究所 wjwang@ysfri.ac.cn 
摘要点击次数: 27
全文下载次数: 0
中文摘要:
      利用叶绿素荧光技术和液相氧电极技术,研究了盐度与钒酸钠胁迫对红毛菜(Bangia fuscopurpurea,海水种)和暗紫红毛菜(Bangia atropurpurea,淡水种)光合作用的影响。结果显示,1)红毛菜和暗紫红毛菜分别在低盐、高盐下胁迫1h,PSII原初光能转化效率(Fv/Fm)均快速下降,且下降幅度与胁迫程度正相关;第3d开始,盐度0和8对红毛菜Fv/Fm具有明显抑制效应,盐度16和24两组与对照相当;暗紫红毛菜,各高盐胁迫组Fv/Fm从第1d开始显著低于对照,但到后期(6-7d)与对照组间无显著差异。2)盐度胁迫对两种红毛菜的表观光合速率(Pn)影响显著,尤其到后期(3d后)多数实验组Pn均显著降低。红毛菜的呼吸耗氧速率(Rd)在胁迫早期变化与Fv/Fm一致,先下降后快速恢复到对照水平;暗紫红毛菜随胁迫时间延长,胁迫组Rd呈上升趋势,显著高于对照。3)高浓度(200-500μmol/L)钒酸钠胁迫3d后可显著抑制红毛菜Fv/Fm,暗紫红毛菜的Fv/Fm在钒酸钠胁迫1d后呈下降趋势,且下降幅度与钒酸钠胁迫程度正相关。4)整体上,随着钒酸钠浓度增加,低盐、高盐胁迫分别加重红毛菜和暗紫红毛菜的Fv/Fm和Pn的抑制效应。而Rd随胁迫程度的增加而升高,在暗紫红毛菜中尤为明显。以上研究结果表明,红毛菜和暗紫红毛菜对盐度胁迫可作出快速响应,其呼吸作用的增强及对质膜-H+-ATPase酶的调控可能在应对盐度胁迫时发挥重要作用,而较长时间盐度胁迫对两种红毛菜的光合作用产生不可逆影响。
英文摘要:
      To make clear the photosynthetic physiology of Bangia , the effect of salinities and Na3VO4 on photosynthesis of Bangia fuscopurpurea and Bangia atropurpurea was investigated, respectively, by using chorophyll Ⅱ fluorescence and photosynthetic oxygen evolution measurement. The main results were shown as follows: 1) The Fv/Fm declined rapidly when B. fuscopurpurea in salinity lower than natural seawater or the B. atropurpurea in salinity higher than freshwater, and the decrease was positively related to the level of stress. The Fv/Fm of B. fuscopurpurea was significantly inhibited under salinity 0 and 8 after 3d of hyposalinity treatment. There was no significant difference among the different hyposalinity stressed-groups of B. fuscopurpurea. The Fv/Fm of B. atropurpurea under hypersalinity stress was significantly lower than the control from the first day, and recovered to the control level after 6-7d of hypersalinity treatment. 2) Salinity stress had significant effects on Pn of the both Bangia species. Rd decreased at the early stage and then rapidly recovered to the control level on the 1st day. After 1d, Rd of the hyposalinity stressed B. fuscopurpurea groups was significantly lower than the control. As the hypersalinity continued, Rd of the stressed B. atropurpurea increased and became significantly higher than the control. 3) After 3d, the Fv/Fm of B. fuscopurpurea decreased significantly under the treatment of 200-500μmol/L Na3VO4. The decrease of Fv/Fm in B. atropurpurea with Na3VO4 treatment was positively correlated with Na3VO4 concentration. 4) In general, with the increase of Na3VO4 concentration, the salinity stress had significant inhibition on the Fv/Fm and Pn of Bangia. Rd of both B. fuscopurpurea and B. atropurpurea increased as the stress was stronger, which was more obvious in B. atropurpurea. The present results revealed that both marine and freshwater Bangia responded quickly to salinity stress. The enhancement of Rd and regulation of plasma membrane-H+-ATPase may play an important role in response to salinity stress. Long-term salinity stress had irreversible harmful effects on the photosynthesis of Bangia.
相关附件:   附件1 图  附件1  附件2
View Fulltext   查看/发表评论  下载PDF阅读器
关闭