| Research on physiological mechanism about Shinyleaf Yellowhorn seedling responding to water stress |
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| DOI：10.7606/j.issn.1000-7601.2012.01.30 |
| Key Words: Shinyleaf Yellowhorn water stress physiological response mechanism |
| Author Name | Affiliation | | CHANG Yanhong | Yanan Vocational & Technical College, Yanan, Shaanxi 716000, China | | WU Wei | College of Life Sciences，Northwest A&F University, Yangling, Shaanxi 712100, China | | LIU Jianchao | College of Life Sciences，Northwest A&F University, Yangling, Shaanxi 712100, China | | CAO Cuiling | College of Life Sciences，Northwest A&F University, Yangling, Shaanxi 712100, China |
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| Abstract: |
| With the absolute soil water content controlled in different levels, a pot experiment was conducted to study the effects of water stress on physiological mechanism in Shinyleaf Yellowhorn (Xanthoceras sorbifo
lia Bunge) seedling. The results showed that, under 13% and 18% of absolute soil water content, the stress level of the branchs reached moderate stress and mild water stress, while the membrane permeability of leaf cell was 16％ and 4％ higher tnan that in the control; the content of soluble sugars was 2.3 and 1.2 times of that in the control, and the proline content increased by 21% and 8% compared to that of the control; the activity of SOD decreased slightly, 5% and 3% lower than in the control respectively, but the activity of CAT decreased greatly, 83% and 68% lower than in the control respectively; the content of MDA incresed by 44% and 1% over that of the control. Water stress had serious negative influence on the accumulation of the dry mass of shoot in Shinyleaf Yellowhorn seedling, and compared with the control, the dry weight decresed by 69% and 84% respectively; the dry weight of root decreased appreciably, by 95% and 109% compared with the control. It is concluded that Shinyleaf Yellowhorn has dought resistance to a certain extent, but it needs timely irrigation during the cultivation to ensure ecnomic output. |
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