Effects of Exogenous Material on Seed Germination and Seedling Morphology of Sorghum

doi:10.11924/j.issn.1000-6850.casb2023-0370

Abstract

Abstract:

In order to explore the effects of different exogenous materials on sorghum seed germination and seedling morphology, different concentrations of sodium nitroprusside (SNP), γ-aminobutyric acid (GABA), salicylic acid (SA) and amino-oligosaccharide (AS) were used to study the effect on seed germination, seedling plant height, root length, basal stem diameter, shoot fresh and dry weight, root fresh and dry weight by seed priming and hydroponic methods. The results showed that: (1) 0.8 mmol/L SA and 0.64 mmol/L AS had the best effect on seed germination. (2) 0.02 mmol/L SNP, 0.5 mmol/L GABA, 0.2 mmol/L SA, and 0.64 mmol/L AS significantly promoted seedling growth. (3) The sensitivity of different exogenous materials to the vegetative organs of seedlings was different. 1.5 mmol/L SNP could better promote the growth of seedlings. The root length showed a downward trend with the increase in SNP concentration. In addition to plant height, other morphological indicators of SA application showed a significant promotion effect, which was conducive to the cultivation of dwarf and strong seedlings. 2.0 mmol/L AS significantly promoted the root elongation of seedlings. 2.0-3.0 mmol/L GABA was not conducive to seedling growth. In summary, seed priming with different exogenous materials can solve the problems of difficult seedling emergence and weak seedling of sorghum by improving seed germination and enhancing seedling morphological indexes. The results of this study provide a theoretical basis for the development of seed treatment agents to improve the quality of sorghum seedlings.

Key words: sorghum, sodium nitroprusside, γ-aminobutyric acid, salicylic acid, amino-oligosaccharides, seed germination, seedling morphology

LI Yuanhong, LI Zhenhua, CAI Lei, DING Ting, WAN Wei, ZHOU Xufan, HE Yuqi. Effects of Exogenous Material on Seed Germination and Seedling Morphology of Sorghum[J]. Chinese Agricultural Science Bulletin, 2024, 40(15): 29-36.

Figures/Tables 16

References 27

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处理	浓度/(mmol/L)
蒸馏水	CK
硝普钠	SNP1=0.02	SNP2=0.04	SNP3=0.06	SNP4=0.08
γ-氨基丁酸	GABA1=0.3	GABA2=0.5	GABA3=0.7	GABA4=0.9
水杨酸	SA1=0.2	SA2=0.36	SA3=0.6	SA4=0.8
氨基寡糖素	AS1=0.08	AS2=0.16	AS3=0.32	AS4=0.64

处理	浓度/(mmol/L)
蒸馏水	CK
硝普钠	SNP1=0.02	SNP2=0.04	SNP3=0.06	SNP4=0.08
γ-氨基丁酸	GABA1=0.3	GABA2=0.5	GABA3=0.7	GABA4=0.9
水杨酸	SA1=0.2	SA2=0.36	SA3=0.6	SA4=0.8
氨基寡糖素	AS1=0.08	AS2=0.16	AS3=0.32	AS4=0.64

处理	浓度/(mmol/L)
营养液	CK
硝普钠	硝1=1.0	硝2=1.5	硝3=2.0
γ-氨基丁酸	丁1=0.5	丁2=2.0	丁3=3.0
水杨酸	水1=1.2	水2=2.4	水3=3.6
氨基寡糖素	寡糖1=2.0	寡糖2=3.5	寡糖3=5.0

处理	浓度/(mmol/L)
营养液	CK
硝普钠	硝1=1.0	硝2=1.5	硝3=2.0
γ-氨基丁酸	丁1=0.5	丁2=2.0	丁3=3.0
水杨酸	水1=1.2	水2=2.4	水3=3.6
氨基寡糖素	寡糖1=2.0	寡糖2=3.5	寡糖3=5.0

处理	发芽势/%	发芽率/%
SNP1	62.67	80.67
SNP2	62.67	86.67
SNP3	69.33	86
SNP4	63.33	88
CK	68.67	86