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Bulletin of Botanical Research ›› 2021, Vol. 41 ›› Issue (3): 449-457.doi: 10.7525/j.issn.1673-5102.2021.03.016

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Response of Photosynthesis and Leaf Morphological Characteristics to Drought Stress in Glycyrrhiza uralensis

Dong ZHANG1,2, Yan LIU1(), Han ZHANG1, Zi-Jian ZHANG1, Yang WANG1, Mei-Cen LIU1   

  1. 1.College of Horticulture and Plant Protection, Inner Mongolia Agricultural University, Hohhot 010011
    2.Inner Mongolia Key Laboratory of Germplasm and Germplasm Enhancement of Wild and Special Vegetable Inner Mongolia Agricultural University, Hohhot 010011
  • Received:2020-01-14 Online:2021-05-20 Published:2021-03-24
  • Contact: Yan LIU E-mail:zgnly@163.com
  • About author:ZHANG Dong(1993—),male,PhD candidate,mainly engaged in the conservation of horticultural plant germplasm resources and the physiological study of plant stress.
  • Supported by:
    The National Natural Science Foundation of China(31560123)


The changes of photosynthesis, stomatal changes and glandular morphologic of leaves in Glycyrrhiza uralensis were measured with pot-culture drought stress in greenhouse, and the drought resistance of them were evaluated by membership function and drought resistance coefficient. The response of leaf photosynthesis, stomatal micromorphology and glandular morphology to drought stress was studied by pot controlled water natural drought method. The results showed that leaf net photosynthetic rate(Pn), stomatal conductance(Gs) and transpiration rate(Tr) have been rising since the degree of drought resistance after the trend of lower, and the intercellular CO2Ci) concentration increased rapidly in the severe drought stress. Moreover, leaf total stomata density and stomata opening than with the intensification of the degree of drought stress, the trend of first increases and then decreases, and stomatal opening width is gradually decreasing trend. Importantly, since the degree of drought stress, leaf epidermis and lower epidermis gland density overall showed a trend of increase in the total number of gland color as the degree of drought stress increased gradually deepened, shape appears irregular fold and retraction. The glandular characteristics on the leaf surface of G. uralensis are involved in the regulation of drought resistance, so as to avoid the damage of drought stress to G.uralensis. Under severe drought stress, stress accelerated the programmed death of stomatal cells(PCD), and G.uralensis seedlings lost their ability to resist drought.

Key words: Glycyrrhiza uralensis, drought stress, photosynthesis, stomatal, glands

CLC Number: