Screening for Salt Tolerance in Eight Halophyte Species from Yellow River Delta at the Two Initial Growth Stages

Author:

Xianzhao Liu123,Chunzhi Wang2,Qing Su4

Affiliation:

1. College of Architecture and Urban Planning, Hunan University of Science and Technology, Xiangtan 411201, China

2. College of Geography and Planning, Ludong University, Yantai 264025, China

3. Department of Geography, Linyi University, Linyi 264000, China

4. College of Life Science, Hunan University of Science and Technology, Xiangtan 411201, China

Abstract

Screening of available local halophytes for salinity tolerance is of considerable economic value for the utilization of heavy salt-affected lands in coastal tidal-flat areas and other saline areas. In this study, the germination and seedling pot experiments on salt tolerance of eight halophytic species from Yellow River Delta, China, at seven NaCl concentrations (0, 50, 100, 150, 200, 250, and 300 mM), were conducted at both growth stages. Results showed that germination rate and germination index decreased with an increase in NaCl concentration. The higher germination rates were obtained from Tamarix chinensis and Suaeda salsa seeds exposed to 0~200 mM NaCl. At the seedling stage, the salt tolerances of eight halophytes were also different from each other. Tamarix chinensis had significantly greater fresh biomass and plant height in relative terms than the others in all salt treatments. The order of the relative growth yield in seedling was Tamarix chinensis > Suaeda salsa > Salicornia europaea > Limonium bicolor > Atriplex isatidea > Apocynum venetum > Phragmites australis > Sesbania cannabina. The comprehensive analysis showed that Tamarix chinensis had the highest tolerance to salt, followed by Suaeda salsa, and the salt tolerance of Sesbania cannabina was the lowest.

Funder

Natural Science Foundation of Shandong Province

Publisher

Hindawi Limited

Subject

Media Technology

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