Journal of Guangxi Normal University(Natural Science Edition) ›› 2018, Vol. 36 ›› Issue (3): 93-100.doi: 10.16088/j.issn.1001-6600.2018.03.014

• Orginal Article • Previous Articles     Next Articles

Eco-Physiological Responses of Leaves of Isoetes sinensis to Light Intensity

ZHUANG Fenghong1, MA Jiangming1, 2, 3, *, ZHANG Yajun1, SU Jing1, YU Fangming2, 4   

  1. 1. College of Life Sciences, Guangxi Normal University, Guilin Guangxi 541006, China;
    2. Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection, Ministry of Education, Guilin Guangxi 541004, China;
    3. Key Laboratory of Karst Ecosystem and Rocky Desertification Control, Ministry of Land and Resources, Guilin Guangxi 541004, China;
    4. College of Environment and Resource, Guangxi Normal University, Guilin Guangxi 541006, China
  • Received:2017-06-27 Online:2018-07-17 Published:2018-07-17

Abstract: Hydroponic culture was conducted to study the effect of different light conditions on the growth of Isoetes sinensis. The paper examined the changing rule of physiological and biochemical characteristics and photosynthetic fluorescence characteristics. The results showed that the chlorophyll content of the leaves of I. sinensis increased and then decreased but other physiological and biochemical indexes including soluble sugar content, malondialdehyde (MDA) content, proline (PRO) content, peroxidase (POD) activities and catalase (CAT) activities gradually decreased at the beginning then increased with the decreasing light intensity. Among the photosynthetic fluorescence characteristics, the PSⅡ effective quantum yield (Yield), PSⅡ maximal quantum yield (Fv/Fm), photochemical quenching (qP), higher potential maximum relative electron transfer rates (Pm), initial slope of rapid light curve (α) and half-starved value of light intensities (Ik) gradually increased and then decreased with the decreasing light intensity, while non-photochemical quenching (qN) decreased and then increased. The suitable light intensity for physiological and photosynthesis of I. sinensis is about 70% of full light. In general,moderate shading should improve the carbon assimilation capacity of I. sinensis, stimulate the accumulation of photoproduct and beneficial in I. sinensis growth.

Key words: Isoetes sinensis, light conditions, physiological and biochemical characteristics, photosynthetic fluorescence characteristics

CLC Number: 

  • Q947.8
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[1] ZHUANG Fenghong, MA Jiangming, CHEN Liting,SU Jing, ZHANG Yajun, YU Fangming. The Physiological and Ecological Responses of Leaves ofIsoetes sinensis under Different pH Treatments [J]. Journal of Guangxi Normal University(Natural Science Edition), 2017, 35(2): 133-141.
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