不同类型盐分对盐爪爪种子萌发和幼苗生长的影响

doi:10.13866/j.azr.2021.05.26

Abstract

Abstract:

The effects of different types of sodium salt stress on seed germination and seedling growth in the eremophyte Kalidium foliatum were studied by measuring the germination rate, germination index, bud length, and root length. In addition, the mechanism of seed germination and seedling growth when adapting to different types of saline alkali land was explored; this work provides insights into the development desert restoration and forage industry in arid areas through K. foliatum planting. Results showed that NaCl, Na₂SO₄, NaHCO₃, and Na₂CO₃ significantly inhibited the germination rate and germination index of K. foliatum. According to regression analysis, the critical values of NaCl, Na₂SO₄, NaHCO₃, and Na₂CO₃ were 325, 267, 245, and 166 mmol·L^-1, respectively, whereas the limit values were 671, 580, 569, and 389 mmol·L^-1, respectively. In addition, NaCl, Na₂SO₄, NaHCO₃, and Na₂CO₃ significantly inhibited the growth of K. foliatum shoots and roots. However, seed germination and seedling growth responses differed significantly according to the four sodium salt exposures. For example, the toxicity of alkaline salt was greater than that of neutral salt. In young seedlings, the shoots were more sensitive to salt exposure than were the roots. Furthermore, root length could be used as a parameter to evaluate the salt tolerance of K. foliatum. Finally, according to the degree of salt toxicity on seed germination and seedling growth, the toxicity to K. foliatum can be ranked as follows: NaCl2SO₄3< Na₂CO₃.

Key words: Kalidium foliatum, salinity stress, sodium, seed germination

LEI Chunying,JI Xiaomin,PENG Muzhi,JIANG Li. Effects of sodium salinity stress types on the germination of Kalidium foliatum seeds and its young seedling growth[J].Arid Zone Research, 2021, 38(5): 1436-1441.

Figures/Tables 5

Tab. 1

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References 25

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参数	盐分类型	盐浓度	盐分类型×盐浓度
萌发率	81.16^***	858.07^***	11.19^***
萌发指数	122.15^***	1422.00^***	15.83^***
芽长	447.84^***	224.51^***	16.75^***
根长	776.25^***	259.07^***	28.01^***

盐浓度 /（mmol·L^-1）	最终萌发率/%				萌发指数
盐浓度 /（mmol·L^-1）	NaCl	Na₂SO₄	NaHCO₃	Na₂CO₃	NaCl	Na₂SO₄	NaHCO₃	Na₂CO₃
0	86.0±1.2a	87.0±1.0a	87.0±1.0a	87.0±1.0a	72.4±1.1a	73.6±0.9a	72.9±0.7a	72.7±0.6a
100	84.0±1.0a	85.0±1.9a	76.0±2.3a	66.0±2.0b	70.5±0.3a	69.4±1.6a	59.3±1.3b	48.7±0.9b
200	81.0±0.0a	63.0±3.0b	59.0±1.0b	43.0±5.0c	57.6±0.9a	47.1±2.0b	42.6±0.6c	25.6±2.4c
300	60.0±3.2b	43.0±6.0c	39.0±2.5c	16.0±2.8d	39.6±2.1b	24.1±3.7c	26.1±1.8d	8.7.0±1.4d
400	36.0±5.9c	22.0±1.2d	19.0±1.9d	-	21.4±4.3c	13.9±0.4d	12.0±1.4e	-
600	5.0±3.0d	-	-	-	3.4±2.0d	-	-	-
800	-	-	-	-	-	-	-	-

Effects of sodium salinity stress types on the germination of Kalidium foliatum seeds and its young seedling growth

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