文献类型： 外文期刊

作者： Yue, Maofeng ¹ ; Shen, Hao ² ; Li, Weihua ⁵ ; Chen, Jinfeng ⁷ ; Ye, Wanhui ² ; Tian, Xingshan ⁴ ; Yin, Aiguo ¹ ; Cheng, S ¹ ;

作者机构： 1.Guangdong Univ Petrochem Technol, Sch Biol & Food Engn, Maoming 525000, Peoples R China

2.Chinese Acad Sci, Key Lab Vegetat Restorat & Management Degraded Ec, Guangdong Prov Key Lab Appl Bot, South China Bot Garden, Guangzhou 510650, Guangdong, Peoples R China

3.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China

4.Guangdong Acad Agr Sci, Inst Plant Protect, Guangdong Prov Key Lab High Technol Plant Protect, Guangzhou 510640, Guangdong, Peoples R China

5.South China Normal Univ, Sch Life Sci, Guangdong Prov Key Lab Biotechnol Plant Dev, Guangzhou 510631, Guangdong, Peoples R China

6.South China Normal Univ, Sch Life Sci, Guangzhou Key Lab Subtrop Biodivers & Biomonitori, Guangzhou 510631, Guangdong, Peoples R China

7.Guangdong Acad Agr Sci, Guangdong Prov Key Lab Ornamental Plant Germplasm, Environm Hort Res Inst, Guangzhou 510640, Guangdong, Peoples R China

关键词： Invasive plants; Bidens pilosa; Waterlogging; Growth; Physiological responses; Competitiveness

期刊名称：PLANT AND SOIL （ 影响因子：4.192； 五年影响因子：4.712 ）

ISSN： 0032-079X

年卷期： 2019 年 437 卷 1-2 期

页码：

收录情况： SCI

摘要： Background and aimsWaterlogging is a common natural disturbance that has negative impacts on dry-land plant species. However, few studies have focused on how waterlogging influences the invasiveness of non-native plant species on dry lands. Bidens pilosa is an invasive dry-land plant of the Asteraceae family that causes serious damage to biodiversity and agricultural production in southern China. To date, it remains unclear how waterlogging affects the competitiveness and growth of B. pilosa. The goal of this study is to determine whether waterlogging promotes the competitiveness of invasive B. pilosa.MethodsThe growth and physiological responses of invasive B. pilosa and native B. biternata and the competition effects between them were studied after 0 (control), 5, 10, 15, and 20days of waterlogging stress (wherein the water level was maintained at the soil surface level).ResultsAfter short-term waterlogging stress, the competitive balance index of invasive B. pilosa significantly increased, indicating that short-term waterlogging on dry lands could significantly improve the competitiveness of invasive B. pilosa. Invasive B. pilosa maintained more rapid adventitious root generating capacity and higher root dehydrogenase activity under waterlogging conditions than native B. biternata, which allowed B. pilosa to adapt to the anoxic conditions much more rapidly. The smaller reductions in net photosynthetic rate, actual quantum yield of photosystem II and relative growth rate in B. pilosa than in B. biternata showed that invasive B. pilosa had stronger tolerance to waterlogging than native B. biternata.ConclusionOur results indicate that invasive B. pilosa has stronger tolerance to waterlogging than native B. biternata and that short-term waterlogging on dry lands can significantly improve the competitiveness of invasive B. pilosa. Short-term waterlogging on dry lands caused by extreme precipitation during the rainy season is expected to promote the invasive potential of exotic B. pilosa.