干旱区生态环境知识资源中心(Arid): Leaf Traits and Water-Use Characteristics of Impatiens hainanensis, a Limestone-Endemic Plant under Different Altitudes in Dry and Foggy Seasons

Arid

DOI	10.3390/w14020139
	Leaf Traits and Water-Use Characteristics of Impatiens hainanensis, a Limestone-Endemic Plant under Different Altitudes in Dry and Foggy Seasons
	Huang, Weixia; Zhong, Yunfang; Zhang, Cuili; Ren, Mingxun; Du, Yanjun; Song, Xiqiang
通讯作者	Zhong, YF ; Song, XQ
来源期刊	WATER
EISSN	2073-4441
出版年	2022
卷号	14 期号:2
英文摘要	The southwestern mountains of Hainan Island are distributed in the southernmost tropical karst landscape of China, and the unique hydrological structure and frequent solifluction droughts lead to double water stress for local plants. Highly heterogeneous water environments affect the water-use characteristics of plants. Plants develop local adaptative mechanisms in response to changes in the external environment. In this paper, hydrogen-oxygen and carbon stable isotope technology, and physiological index measurements were applied to determine the leaf traits, water-use efficiency, and photosynthetic characteristics of Impatiens hainanensis leaves in dry and foggy seasons, hoping to expound the adaptation mechanism of I. hainanensis leaves to the water dynamics in dry and foggy seasons. In dry and foggy seasons (November 2018 to April 2019), the leaves of I. hainanensis at low and medium altitudes have the following combination of traits: larger leaf dry weights, leaf areas, and specific leaf areas; smaller leaf thicknesses and leaf dry matter contents; and higher chlorophyll contents. In comparison, the leaves of I. hainanensis at high altitudes have the following combination of traits: smaller leaf dry weights, leaf areas, and specific leaf areas; larger leaf thicknesses and leaf dry matter contents; and lower chlorophyll contents. The leaves of I. hainanensis can absorb fog water through their leaves. When the leaves are sprayed with distilled water, the water potential is low, the water potential value gradually increases, and the leaves have a higher rate of water absorption. The leaves of I. hainanensis at low and medium altitudes have the following water-use characteristics: high photosynthesis, high transpiration, and low water-use efficiency. At high altitudes, the Pn of I. hainanensis decreases by 8.43% relative to at low altitudes and by 7.84% relative to at middle altitudes; the Tr decreased by 4.21% relative to at low altitudes and by 3.38% relative to at middle altitude; the WUE increased by 16.61% relative to at low altitudes and increased by 40.79% relative to at middle altitudes. The leaves of I. hainanensis at high altitudes have the following water-use characteristics: low photosynthesis, low transpiration, and high water-use efficiency. I. hainanensis develop different physiological mechanisms of water adaptation by weighing the traits of the leaves and their use of light and water to obtain resources during dry and foggy seasons.
英文关键词	Impatiens hainanensis karst altitude leaf traits water utilization
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000748072200001
WOS关键词	CARBON-ISOTOPE DISCRIMINATION ; USE EFFICIENCY ; ROCKY DESERTIFICATION ; RAINFALL INTENSITY ; CLIMATE-CHANGE ; WOODY-PLANTS ; DROUGHT ; GROWTH ; FOREST ; TREES
WOS类目	Environmental Sciences ; Water Resources
WOS研究方向	Environmental Sciences & Ecology ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/376760
推荐引用方式 GB/T 7714	Huang, Weixia,Zhong, Yunfang,Zhang, Cuili,et al. Leaf Traits and Water-Use Characteristics of Impatiens hainanensis, a Limestone-Endemic Plant under Different Altitudes in Dry and Foggy Seasons[J],2022,14(2).
APA	Huang, Weixia,Zhong, Yunfang,Zhang, Cuili,Ren, Mingxun,Du, Yanjun,&Song, Xiqiang.(2022).Leaf Traits and Water-Use Characteristics of Impatiens hainanensis, a Limestone-Endemic Plant under Different Altitudes in Dry and Foggy Seasons.WATER,14(2).
MLA	Huang, Weixia,et al."Leaf Traits and Water-Use Characteristics of Impatiens hainanensis, a Limestone-Endemic Plant under Different Altitudes in Dry and Foggy Seasons".WATER 14.2(2022).