富氢水对干旱胁迫下大麦种子萌发及幼苗生物量分配的影响

doi:10.16035/j.issn.1001-7283.2021.04.032

摘要/Abstract

摘要：

为探讨富氢水对干旱胁迫下大麦种子萌发期抗旱性与幼苗生物量分配的影响,以大麦品种“新啤6号”为试材,采用20%聚乙二醇（PEG）-6000模拟干旱胁迫,比较不同浓度富氢水浸种处理后大麦种子的发芽率和幼苗根冠比等16个指标的差异。结果表明,适宜浓度的富氢水处理能显著提高干旱胁迫下大麦种子的发芽率、干物质转移量、转移率及转化效率,并减少呼吸消耗干物质量,还可以降低干旱胁迫下大麦幼苗根冠比,增加幼苗根和芽的干重,促进幼苗可溶性糖、可溶性蛋白及叶绿素累积。由此可知,一定浓度的富氢水能通过调控种子干物质转运的途径提升干旱胁迫下大麦种子的萌发率,并可通过调节可溶性糖、可溶性蛋白和叶绿素含量降低干旱胁迫对大麦幼苗根和芽生物量分配的不利影响。

关键词: 富氢水, 干旱胁迫, 大麦, 萌发

Abstract:

To investigate the effects of hydrogen-rich water (HRW) on drought resistance in germination period and seedling biomass distribution under drought stress, barley variety Xinpi 6 was used as material, which cultured in 20% polyethylene glycol-6000 (PEG). The 16 indexes were compared in different concentrations of HRW, such as germination rate and seedling root-shoot ratio. The results showed that the suitable concentration of HRW treatment could significantly increase the germination rate, dry matter transfer amount, transfer rate, and conversion efficiency; reduced respiratory consumption of dry matter and root-shoot ratio; increased the roots and buds’ dry weight; promoted the accumulation of soluble sugar, soluble protein, and chlorophyll in barley seedlings. It could be concluded that suitable concentration of HRW could increase the germination rate of barley seeds under drought stress by regulating the transport of dry matter, and reduce the adverse effects of drought stress on the proportion of root and bud biomass of seedlings by regulating the contents of soluble sugar, soluble protein, and chlorophyll.

Key words: Hydrogen-rich water, Drought stress, Barley, Germination

宋瑞娇, 冯彩军, 齐军仓. 富氢水对干旱胁迫下大麦种子萌发及幼苗生物量分配的影响[J]. 作物杂志, 2021 (4): 206–211

Song Ruijiao, Feng Caijun, Qi Juncang. Effects of Hydrogen-Rich Water on Barley Seed Germination and Barley Seedling Biomass Distribution under Drought Stress[J]. Crops, 2021(4): 206–211

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富氢水浓度 HRW concentration (%)	干物质转移量 Dry matter transfer amount (mg)	干物质转移率 Dry matter transfer rate (%)	呼吸消耗干物质量 Respiratory consumption of dry matter (mg)	干物质转化效率 Dry matter conversion efficiency (%)
0(CK)	426.39±20.15bA	67.72±3.20bA	313.79±22.98aA	26.59±1.98bBC
25	454.13±8.20abA	72.12±1.31abA	302.89±12.83bA	33.36±1.64aB
50	465.49±19.97abA	73.93±3.17abA	303.79±20.49bA	34.87±1.58aA
75	474.26±2.20aA	75.32±0.35aA	310.89±8.68bA	34.45±1.61aB
100	482.59±10.51aA	76.64±1.67aA	362.93±15.91aA	24.87±1.73aC

富氢水浓度 HRW concentration (%)	幼苗干重 Seedling dry weight (mg)	根干重 Root dry weight (mg)	芽干重 Bud dry weight (mg)	根冠比 Root-shoot ratio
0(CK)	112.60±3.10bB	72.10±2.48cC	40.50±2.35cB	1.79±0.14abAB
25	151.23±4.72aA	82.70±4.69bcBC	68.53±0.68aA	1.21±0.07cB
50	161.70±1.76aA	91.97±2.40bAB	69.73±2.11aA	1.32±0.07bcAB
75	163.37±7.15aA	105.87±6.95aAB	57.50±1.81bA	1.85±0.13abAB
100	119.67±5.82bB	79.80±0.81bcBC	39.87±6.54cB	2.10±0.31aA

富氢水浓度 HRW concentration (%)	叶绿素a Chlorophyll a	叶绿素b Chlorophyll b	叶绿素总含量 Total chlorophyll content
0(CK)	780.07±23.21dC	249.68±21.52abA	1029.76±33.64cD
25	1173.08±63.89aA	259.51±15.37aA	1432.59±78.98aA
50	1034.44±34.40bB	218.03±7.17bA	1252.48±41.51bB
75	968.96±8.45bB	214.88±2.79bA	1183.84±9.79bBC
100	850.46±33.16cC	219.22±34.81bA	1069.69±67.54cCD