Comparative drought tolerance of six native deciduous and broad-leaved woody plant species seedlings in the Qinghai–Tibet Plateau

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• 作者：Qiqiang Guo ; Huie Li ; Daqing Luo ; Hong Quan ; Duoji Bianba…
• 关键词：Drought stress ; Physiological and biochemical ; Woody plant species ; Qinghai–Tibet Plateau
• 刊名：Acta Physiologiae Plantarum
• 出版年：2016
• 出版时间：January 2016
• 年：2016
• 卷：38
• 期：1
• 全文大小：570 KB
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• 作者单位：Qiqiang Guo (1) (2) (3) (4)
  Huie Li (2)
  Daqing Luo (2) (3) (4)
  Hong Quan (2) (3) (4)
  Duoji Bianba (5)
  WenHui Zhang (1)
  
  1. College of Forestry, Northwest A&F University, Yangling, 712100, China
  2. Agricultural and Animal Husbandry College, Tibet University, Nyingchi, 860000, China
  3. National Key Station for Field Scientific Observation and Experiment, Nyingchi, 860000, Tibet, China
  4. Ministry of Education Key Laboratory of Forest Ecology in Tibet Plateau, Nyingchi, 860000, Tibet, China
  5. Research Institute of Forestry Investigation in Tibet Autonomous Region, Lhasa, 850032, Tibet, China
  
• 刊物主题：Plant Physiology; Plant Genetics & Genomics; Plant Biochemistry; Plant Pathology; Plant Anatomy/Development; Agriculture;
• 出版者：Springer Berlin Heidelberg
• ISSN：1861-1664

文摘

Choice of native woody species with higher drought tolerance is the basic work on afforestation in Qinghai–Tibet Plateau (QTP) region. However, no systemic evaluation has been made of the drought tolerance ability. In the present study, we compared the drought injury degree and ten physiological and biochemical indices from six native deciduous and broad-leaved woody plant species seedlings under continuous drought for 21 days. The ten indices included relative water content, net photosynthetic rate, transpiration, water use efficiency, superoxide dismutase, peroxidase, catalase and malondialdehyde, proline and soluble sugars contents of leaves. Under drought stress, six native species showed the different response. According to analysis of the mean membership function values, the drought tolerance of six native species could be ranked in the following order: Berberis hemsleyana > Sophora viciifolia > Betula platyphylla > Cotoneaster rotundifolius > Prunus mira > Hippophae rhamnoides. Species B. hemsleyana and S. viciifolia were relatively high drought-tolerant, while P. mira and H. rhamnoides were relatively low tolerant. The two high-tolerant native species resist to drought by different strategies after long-term adaptation, and these two species should be given prior consideration in deciduous woody plant species selection for afforestation in arid and semi-arid area of QTP in the future. Keywords Drought stress Physiological and biochemical Woody plant species Qinghai–Tibet Plateau