干旱、盐分和酸胁迫对药用植物马利筋和苋菜种子萌发的影响

doi:10.13866/j.azr.2025.02.11

Abstract

Abstract:

The effect of environmental factors on the seed germination of two medicinal plants, Asclepias curassavica and Amaranthus tricolor, was studied using PEG-6000, NaCl, and pH gradient solutions to simulate drought, salt, and acidity stresses, respectively. The results provide the basis for their cultivation in arid, saline-alkali areas and the production of high-quality medicinal materials. The findings revealed that the seed germination percentage and index of A. curassavica and A. tricolor decreased with increasing PEG and NaCl concentrations. After 14 days of stress, the nongerminated seeds could rapidly germinate after rehydration and did not lose their vitality. TTC staining of the nongerminated seeds after rehydration revealed that the seeds remained active; the viable seed proportion of the two medicinal plants was significantly higher than in the control or did not decrease significantly, with mean values of 84% and 90%, respectively. At pH 3-6, the A. curassavica and A. tricolor seed germination percentages were 57% and 83%, while the nongerminated seeds of A. curassavica and A. tricolor lost their vitality. The percentages of dead seeds were 10% and 15%, and the proportions of viable seeds were 91% and 87%, respectively, for A. curassavica and A. tricolor. The two medicinal plants displayed a certain tolerance to drought and salt stress and a strong tolerance to acid stress during germination. The two plants can adopt different germination strategies, such as advanced or delayed germination or dormancy, to adapt to their environmental stresses. This study clarified the seed germination characteristics and differences of A. curassavica and A. tricolor under three abiotic stress factors. It provides a theoretical basis for producing and improving the quality of two medical plants.

Key words: medicinal plant, Asclepias curassavica, Amaranthus tricolor, seed germination, tolerance

JIA Fengqin, HUANG Mintao, DENG Li, LI Jinling, LIANG Meihua, YI Hongwei, SONG Xijuan. Effects of drought, salt, and acidity stresses on Asclepias curassavica and Amaranthus tricolor seed germination[J].Arid Zone Research, 2025, 42(2): 312-320.

Figures/Tables 5

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References 26

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处理		马利筋				苋菜
处理		萌发率/%	恢复萌发率/%	染色种子占比/%	具活力种子占比/%	萌发率/%	恢复萌发率/%	染色种子占比/%	具活力种子占比/%
PEG浓度/%	CK	88.43±2.63a	0.00±0.00c	2.89±0.96b	91.32±1.69a	78.13±2.90a	0.00±0.00d	0.50±0.50b	78.63±2.57c
	5	32.92±8.72b	42.39±9.89b	13.02±2.47a	88.33±6.87a	45.28±4.33b	22.04±4.92c	14.56±2.73a	81.87±2.55bc
	10	16.82±2.28c	63.35±4.07a	6.56±2.72ab	86.74±5.94a	36.44±2.16c	46.28±2.56b	14.71±2.73a	97.43±0.94a
	15	20.83±4.74bc	64.17±7.78a	6.46±2.55ab	91.47±5.16a	11.59±2.88d	57.38±4.97b	13.47±0.82a	82.44±3.02bc
	20	5.84±2.10c	71.25±7.49a	5.00±5.00ab	82.09±9.36a	0.00±0.00e	78.97±4.36a	10.26±2.30a	89.23±2.32b

处理		马利筋				苋菜
处理		萌发率/%	恢复萌发率/%	染色种子占比/%	具活力种子占比/%	萌发率/%	恢复萌发率/%	染色种子占比/%	具活力种子占比/%
NaCl浓度/（mmol·L^-1）	CK	88.43±2.63a	0.00±0.00d	2.89±0.96c	91.31±1.69a	78.12±2.90a	0.00±0.00d	0.50±0.50c	78.63±2.58c
	50	6.92±0.25b	36.28±4.22a	46.54±4.71b	89.74±1.78a	33.17±1.35b	50.76±1.12c	7.01±3.10ab	90.95±1.30a
	100	0.00±0.00c	23.69±1.74b	47.50±5.50b	71.19±5.67c	1.40±0.87c	81.77±3.53b	9.62±1.96a	92.79±1.49a
	150	0.00±0.00c	10.47±4.55c	64.73±7.27a	75.20±3.17bc	0.00±0.00c	89.14±2.01a	2.96±1.97bc	92.10±1.36a
	200	0.00±0.00c	11.66±3.19c	71.67±1.66a	83.33±1.92ab	0.00±0.00c	94.04±0.78a	0.49±0.49c	94.53±1.49a

处理		马利筋				苋菜
处理		萌发率/%	恢复萌发率/%	染色种子占比/%	具活力种子占比/%	萌发率/%	恢复萌发率/%	染色种子占比/%	具活力种子占比/%
pH值	3	72.53±3.34b	0.00±0.00a	18.18±3.12b	90.71±1.78a	88.25±0.95ab	0.00±0.00a	1.04±0.60a	89.29±0.37ab
	3.5	74.26±3.43b	0.00±0.00a	18.66±2.97b	92.92±1.12a	82.00±3.89bc	0.00±0.00a	1.48±0.94a	83.49±3.15bc
	4	67.17±2.31bc	0.00±0.00a	25.39±2.12ab	92.57±2.82a	81.92±4.20bc	0.00±0.00a	1.52±0.97a	83.45±3.29bc
	4.5	57.71±0.86c	0.00±0.00a	30.85±2.54a	88.57±2.19a	86.47±2.26abc	0.00±0.00a	0.51±0.51a	86.99±2.11ab
	5	66.86±5.82bc	0.00±0.00a	25.06±3.72ab	91.93±2.15a	87.92±1.85ab	0.00±0.00a	0.00±0.00a	87.93±1.85ab
	6	57.94±2.06c	0.00±0.00a	31.15±4.02a	89.09±3.67a	91.47±1.88a	0.00±0.00a	0.00±0.00a	91.47±1.88a
	CK	88.43±2.63a	0.00±0.00a	2.89±0.96c	91.31±1.69a	78.13±2.90c	0.00±0.00a	0.50±0.50a	78.63±2.58c

Effects of drought, salt, and acidity stresses on Asclepias curassavica and Amaranthus tricolor seed germination

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