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林业科学 ›› 2014, Vol. 50 ›› Issue (9): 73-81.doi: 10.11707/j.1001-7488.20140910

• 论文与研究报告 • 上一篇    下一篇

模拟水淹对中华蚊母树生长及光合特性的影响

刘泽彬, 程瑞梅, 肖文发, 郭泉水, 王娜   

  1. 中国林业科学研究院森林生态环境与保护研究所 国家林业局森林生态环境重点实验室 北京 100091
  • 收稿日期:2013-11-14 修回日期:2014-01-18 出版日期:2014-09-25 发布日期:2014-09-30
  • 基金资助:

    “十二五”国家科技支撑计划课题“长江流域防护林体系整体优化与调控技术”(2011BAD38BO4)。

Effect of Flooding on Growth, Photosynthesis and Fluorescence Characteristics of Distylium chinense

Liu Zebin, Cheng Ruimei, Xiao Wenfa, Guo Quanshui, Wang Na   

  1. Key Laboratory of Forest Ecology and Environment,State Forestry Administration Research Institute of Forest Ecology,Environment and Protection,CAF Beijing 100091
  • Received:2013-11-14 Revised:2014-01-18 Online:2014-09-25 Published:2014-09-30
  • Contact: 程瑞梅

摘要:

通过设置对照(CK)、持续性水淹(CF)、间歇性水淹(PF)和全淹(FF)4个水淹处理,模拟三峡库区秋冬季消落带土壤水淹变化,研究2年生中华蚊母树的生理生态适应机制。结果表明: 不同水淹形式并没有显著影响中华蚊母树的株高和基径,而光合色素含量、光合及叶绿素荧光特性在不同水淹形式下却有所差异,CF和PF植株光合色素含量、净光合速率(Pn)、气孔导度(Gs)、蒸腾速率(Tr)、最大光化学效率(Fv/Fm)、光化学猝灭(qP)以及电子传递速率(ETR)均出现了显著下降,但PF植株下降的幅度要小于CF植株,除光合色素含量、GsTr外,其他指标均差异显著,而FF植株光合色素含量、PnGsTrFv/FmqP以及ETR均未受到水淹的影响,与CK植株差异不显著; CF和PF植株叶片非光化学淬灭(qN)未受到水淹的影响,但FF植株叶片qN与CK相比却显著下降。虽然CF植株较其他处理植株叶绿素含量、PnGsTr、Fv/FmqP以及ETR均下降明显,但水淹处理植株能够通过形成不定根、特化的皮孔以及减少叶片数量来增加耐淹能力。因此,中华蚊母树具有较强的耐淹能力,在不同水淹形式下均表现出一定的适应性和可塑性。

关键词: 水淹, 中华蚊母树, 生长, 光合, 荧光

Abstract:

Four flooding treatments (control, CK; continuous flooding, CF; periodic flooding, PF; and Full flooding, FF) were set in simulating the soil flooding change of the riparian zone in the Three Gorges Reservoir region of China to study the physiological and ecological adaptation mechanisms of two-year-old perennial Distylium chinense seedlings to the soil flooding change. There were no significant differences in height and basal diameter of the seedlings grown under different water regimes, while the content of chlorophyll, photosynthesis and fluorescence characteristics under different flooding forms were significantly different. Chlorophyll content, net photosynthetic rate(Pn), stomatal conductance(Gs), transpiration rate(Tr), maximal photochemical efficiency (Fv/Fm), photochemical quenching (qP) and electron transfer rate (ETR) in CF and PF decreased significantly, and the decrease in PF was smaller than CF. In addition to chlorophyll content, Gs and Tr, the other indicators were significantly different; Chlorophyll content, Pn,Gs,Tr,Fv/Fm,qP and ETR in FF were not significantly different compared with CK;Non-photochemical quenching(qN)in CF and PF was not significantly different from CK, while the qN in FF was decreased significantly. Although the chlorophyll content, Pn,Gs,Tr,Fv/Fm,qP and ETR in CF decreased significantly compared with the other treatments, the plants were able to form adventitious roots, hypertrophic lenticels and reduce the leaf increment to enhance resilience to flooding. Thus, D. chinense has strong tolerant capabilities to submergence, and shows a certain adaptability and plasticity in different flooding forms.

Key words: flooding, Distylium chinense, growth, photosynthesis, fluorescence characteristics

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