期刊
ECOLOGY AND EVOLUTION
卷 10, 期 15, 页码 8166-8175出版社
WILEY
DOI: 10.1002/ece3.6519
关键词
altitudinal gradient; anatomical structure; plant life form; stomatal density; the Yulong Mountains
资金
- Hunan Provincial Natural Science Fund [2016JJ4120]
- National Natural Science Foundation of China [31160048]
Leaf anatomical traits play key roles in plant functions and display evolutionary adaptive changes to suit the surrounding environment. To reveal the adaptive mode and mechanisms of plants in response to global warming, we analyzed leaf morphology and anatomical structures in three different species,Epilobium amurenseHausskn.,Pedicularis densispicaFranch., andPotentilla fulgensWall. ex Hook., growing along an elevational gradient (3,000-4,600 m) in the Yulong Mountains. The results showed leaf length and width decreased, whereas leaf thickness increased with increasing altitude in all three species. Thickness of leaf upper epidermis, lower epidermis, palisade and spongy mesophyll, and main vein increased with rising altitude. Stomatal density in each species increased with rising elevation. These results illustrate that plants can adapt to the environmental changes that accompany high altitudes by decreasing leaf area and increasing leaf thickness, mesophyll tissue thickness, and stomatal density. Such morphological and anatomical plasticity would lead to lower transpiration rates, enhanced internal temperature and water status, and improved photosynthetic capability.
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