Chin J Plant Ecol ›› 2013, Vol. 37 ›› Issue (4): 354-364.DOI: 10.3724/SP.J.1258.2013.00035

• Research Articles • Previous Articles     Next Articles

Change of different shading on moisture conditions and the physiological response in Alhagi sparsifolia

TANG Gang-Liang1,2,3, LI Xiang-Yi1,3,*(), LIN Li-Sha1,3, LI Lei1,2,3, LU Jian-Rong1,2,3   

  1. 1Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, ürümqi 830011, China
    2University of Chinese Academy of Sciences, Beijing 100049, China
    3Cele National Station of Observation & Research for Desert Grassland Ecosystem, Cele, Xinjiang 848300, China
  • Received:2012-10-22 Accepted:2013-02-13 Online:2013-04-01 Published:2013-04-09
  • Contact: LI Xiang-Yi

Abstract:

Aims Alhagi sparsifolia, which occurs in arid regions, is commonly considered a type of sun plant. However, the effects of shade on A. sparsifolia are complex, because in addition to reduced light intensity, shade often changes other environmental factors. Our goal is to study the impact of different shading on the physiological form-especially in terms of water-of A. sparsifolia.
Methods We used natural light, moderate shade (70% natural light) and severe shade (30% natural light) and after 90 days observed reactions of water status, leaf morphology and stress resistance indicators in A. sparsifolia.
Important findings With the increase in shading, there are rises in soil moisture content, water potential, stomatal conductance, specific leaf area, chlorophyll (Chl) and carotenoid content in A. sparsifolia, as well as declines in leaf thickness, proline, malondialdehyde, soluble sugar content and Chl a/Chl b. Moderate shade for A. sparsifolia can reduce the temperature and increase the humidity. This can improve the habitats of A. sparsifolia by avoiding damage caused by high temperature, high light and low water potential and then promoting the growth of plants, although long-term shade is detrimental. Therefore, we recommend protecting A. sparsifolia and promoting its growth with short-term shade, especially during the high temperatures and strong light at noon in the summer.

Key words: Alhagi sparsifolia, light, moisture, shade