Morphological Variations and Physiological Characteristics of Phragmites australis in Three Habitats in Yellow River Delta

doi:10.7525/j.issn.1673-5102.2019.03.007

Abstract

Abstract: An experiment was conducted to study the adaptive strategies of Phragmites australis by designing the differentexperiment habitats. The results showed that:(1)For the maximum height and the average height, the highest crown and the average crown, and the coverage of P.australis, aquatic was the biggest, next was hygrophilous, the xeromorph was smallest, and the abundance in the xeromorph environment was similar to the aquatic condition. (2)Different caulis length appeared in different habitats, and with water content descending, the number of sucher increased, the height of sucher reduced.There was a gradual reduction in leaf area and diameter of sucher, with water stress increasing, the node number reduced, the length of node became shorter, the root lengh reduced, and thetotal of roots increased. (3)In the xeromorphic condition, the activities of SOD, POD of enzymes of roots and leaves and the activities of CAT were significantly higher than those of the aquaticand hygrophiloushabitats.In three different habitats, the MDA content of the xeromorph and hygrophilous habitats were significantly higher than those of the aquatichabitats. The morphological variations and physiological characteristics of these traits might have resulted from adaptability of P.australis in three habitats.

Key words: Phragmites australis, habitat, biomass, physiological characteristics, cell protective enzyme

CLC Number:

XIE Zhi-Yu, ZHANG Wen-Hui, WEI Yong-Tao. Morphological Variations and Physiological Characteristics of Phragmites australis in Three Habitats in Yellow River Delta[J]. Bulletin of Botanical Research, 2019, 39(3): 372-379.

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