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Journal of Desert Research ›› 2024, Vol. 44 ›› Issue (5): 205-216.DOI: 10.7522/j.issn.1000-694X.2024.00118

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Relationship between leaf PV curve water parameters and anatomical characteristics of ten plants spieces in the Ulan Buh Desert

Ruibing Duan1,2(), Rui Zhang2, Lele Wang2, Yaxin Zhang2, Zhan Yang1, Xue Dong1, Yingbin Ma1()   

  1. 1.Experimental Center of Desert Forestry,Chinese Academy of Forestry,Dengkou 015200,Inner Mongolia,China
    2.Center for Ecological Research,Northeast Forestry University,Harbin 150040,China
  • Received:2024-06-08 Revised:2024-09-04 Online:2024-09-20 Published:2024-10-15
  • Contact: Yingbin Ma

Abstract:

Shrubs play a crucial role in desertification control and vegetation restoration, especially under the influence of drought induced by climate change. However, the morphological and anatomical characteristics of desert shrubs and their adaptation mechanisms remain unclear. In this study, ten common plant spieces were selected from the same site conditions in the Ulan Buh Desert, and were classified into C3 and C4 plants based on their photosynthetic pathways. We investigated the leaf PV curve water parameters of the plants under drought stress, as well as their leaf anatomy, structure, and adaptation mechanisms. Our results indicate that: (1) There is significant interspecific variation among the ten woody plants in terms of their PV traits and anatomical characteristics. (2) There are significant differences between C3 and C4 plants in PV traits, leaf thickness, cuticle thickness, specific leaf area (SLA), and leaf dry matter content (LDMC). C3 plants exhibit higher values of turgor loss point (Ψtlp) and osmotic potential at full turgor (Ψ0), but lower leaf water capacity (Cleaf) compared to C4 plants. The leaf thickness and cuticle thickness of C3 plants are significantly lower than those of C4 plants, while SLA and LDMC are significantly higher in C3 plants. (3) There are significant correlations between leaf thickness, mesophyll structure, and ΨtlpCleaf, and modulus of elasticity (ε) among PV traits. Moreover, the relationship between leaf anatomical characteristics and PV traits varies among plants with different photosynthetic pathways.

Key words: arid region, turgor loss point, anatomical structure characteristics, photosynthetic pathway

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