GGR<sub>6</sub>浸种处理浓度对沙打旺种子活力及萌发特性的影响

doi:10.16843/j.sswc.2017.02.009

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Abstract [Background] Regulator for growth, development and reproduction of the plant, is an important means to improve adaptability and production capacity, and has a key impact on ecological construction of desert land management using plant measures. The seed germination ability affects directly the growth, reproduction and production of plants, determines the success of some plants settled in the adversity, and has a critical effect on the life history, population growth, the formation and succession of plants. Astragalus adsurgens is one of the main species for soil and water conservation and ecological construction in the Loess Plateau of China. Understanding the effects of plant growth regulators on seed vigor and germination characteristics of A. adsurgens is for improving adaptive ability to adverse environment and for increasing vegetative coverage during restoration and reconstruction of vegetation. [Methods] The concentrations of 0, 50, 100, 150 and 200 mg/L plant growth regulator GGR₆ solution, respectively at 20 ℃ (G₅₀, G₁₀₀, G₁₅₀, and G₂₀₀) and dark conditions (CK) were designed to soak A. adsurgens seed for 24 hours, and the influences of GGR₆ on seed vigor and germination characteristics of A. adsurgens were observed. Seed viability test (a constant temperature of 30 ℃) and germination test (constant temperature, relative humidity of 80%, 12 h light and 12 h darkness alternating) were conducted in the artificial climate chamber for the observation of seed vigor, germination energy, germination rate, germination index and vigor index with five replications of each treatment. Excel and SAS 9.0 statistical software were used for data processing, mapping and variance analysis. The suitable GGR₆ concentration for A. adsurgens seed germination was selected by membership function method. [Results] 1) The seed germination of A. adsurgens was "unimodal type", and the same tendency presented in the different treatments. The order of seed germination rate was CK > G₅₀ > G₁₀₀ > G₁₅₀ > G₂₀₀ in the first day, and peak value of germination rate (2 to 4 days) was CK < G₅₀ < G₁₀₀ < G₁₅₀ < G₂₀₀. 2) Seed vigor, germination energy, germination rate, germination index, and vigor index of A. adsurgens increased with increasing concentration of GGR₆ when GGR₆ concentration was below 100 mg/L. The effects of the treatments on seed vigor, germination energy, germination rate, and vigor index were not obvious when the GGR₆ concentration was higher than that of 100 mg/L, and germination index also decreased. [Conclusions] 1) GGR₆ solution improved the speed and rate of seed germination of A. adsurgens (Germination process advanced 1 day). 2) Each value increased significantly (P < 0.05) when the concentration were 50-100 mg/L. 3) The order of seed vigor and germination characteristic indexes based on the average values of membership function was G₁₀₀ > G₂₀₀ > G₁₅₀ > G₅₀ > CK. The optimal GGR₆ concentration was 100 mg/L for seed germination of A. adsurgens.

Key words： Astragalus adsurgens GGR₆ seed vigor germination characteristics membership function method

Received: 13 September 2016

PACS:

S714.6

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	Articles by authors
	CHEN Shichao
	WANG Meng
	GAO Yong
	WANG Ji
	LIU Zongqi
	WANG Xiang
	ZHANG Xiaowei

Cite this article:

CHEN Shichao,WANG Meng,GAO Yong, et al. Influences of the different GGR₆ concentrations on the seed vigor and germination characteristics of Astragalus adsurgens[J]. SSWC, 2017, 15(2): 70-78.

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http://journal12.magtechjournal.com/Jweb_stbc/EN/10.16843/j.sswc.2017.02.009 OR http://journal12.magtechjournal.com/Jweb_stbc/EN/Y2017/V15/I2/70

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