文献类型：期刊文献

中文题名：不同土壤水分条件下吲哚丁酸钾对大豆根系形态建成及生理代谢的影响

英文题名：Effects of potassium indole butyrate on root morphogenesis and physiological metabolism of soybean under different soil water conditions

作者：刘美玲[1,2];冯乃杰[1,3,2];郑殿峰[1,3,2];冯胜杰[2];王诗雅[2];项洪涛[4]

机构：[1]广东海洋大学滨海农业学院,广东湛江524088;[2]黑龙江八一农垦大学农学院,黑龙江大庆163319;[3]广东海洋大学深圳研究院,广东深圳518108;[4]黑龙江省农业科学院耕作栽培研究所,黑龙江哈尔滨150086

年份：2022

卷号：44

期号：3

起止页码：621

中文期刊名：中国油料作物学报

外文期刊名：Chinese Journal of Oil Crop Sciences

收录：CSTPCD、、CSCD2021_2022、北大核心、CSCD、北大核心2020

基金：国家自然科学基金(31571613);黑龙江省自然科学基金重点项目(ZD 2017003);国家重点研发计划(2017YFD0201306-03)。

语种：中文

中文关键词：大豆;根系;干旱;吲哚丁酸钾

外文关键词：soybean;root system;drought stress;potassium indole butyrate

中文摘要：为了研究吲哚丁酸钾(IBA-K)在减轻干旱对大豆根系的伤害中的作用,以垦丰16(干旱敏感型)和合丰50(耐旱型)为材料,采用盆栽法研究IBA-K拌种对两个品种大豆在正常供水、干旱和复水条件下根系形态建成及生理代谢的影响。结果表明,与正常供水相比,干旱胁迫抑制了大豆根系的生长发育,而IBA-K处理后,大豆根系干物质积累量、形态建成、抗氧化酶活性和渗透调节物质含量在不同土壤水分条件下均高于其干旱对照,膜受损程度减轻。IBA-K处理下,大豆根系SOD活性、POD活性、可溶性糖和脯氨酸含量在干旱条件下均显著高于其干旱对照;MDA含量、相对电导率显著低于其干旱对照。IBA-K处理下的两个品种大豆根表面积、根平均直径、根体积、POD活性和CAT活性在复水条件下分别高于其干旱对照,均未达到显著性差异。复水后,IBA-K处理下的垦丰16根干重和总根长分别较其干旱对照显著增加了3.13%和24.51%,合丰50根干重和总根长较其干旱对照未达到显著性差异。IBA-K处理下的合丰50相对电导率和MDA含量分别较其干旱对照显著降低11.80%和15.09%,SOD活性和可溶性糖含量分别较其干旱对照显著增加14.90%和3.94%,垦丰16相对电导率、MDA含量、SOD活性和可溶性糖含量较其干旱对照未达到显著性差异。IBA-K处理下的两个品种大豆根系脯氨酸含量分别较其干旱对照显著增加了10.62%和10.70%。IBA-K处理和不同土壤水分处理对两个品种大豆根系形态和生理指标存在显著或极显著影响,二者间的交互作用无明显调控作用。综上,IBA-K通过提高根系干物质积累量、抗氧化酶活性和渗透调节物质含量,降低MDA含量和相对电导率,减轻干旱胁迫对苗期大豆根系的伤害。

外文摘要：In this paper,Kenfeng 16(drought-sensitive)and Hefeng 50(drought-tolerant)were used as test materials,the potted method was used to study the effects of indole butyrate potassium(IBA-K)seed dressing on root morphogenesis and physiological metabolism of the two varieties of soybean under normal water supply,drought and rewatering conditions.The result showed that compared with normal water supply,drought stress inhibited the growth and development of soybean roots.Dry matter accumulation,morphogenesis,antioxidant enzyme activity and osmotic adjustment substance content of two varieties under IBA-K treatment were higher than their drought control under different soil moisture conditions,reducing the degree of membrane damage.SOD activity,POD activity,soluble sugar and proline content of the two varieties under IBA-K treatment were significantly higher than the drought control under drought conditions,MDA content and relative conductivity were significantly lower than the drought control.Root surface area,average root diameter,root volume,POD activity and CAT activity of the two varieties under IBA-K treatment were higher than their drought control under rewatering conditions,and no significant difference was reached.After rewatering,the dry weight and total root length of Kenfeng 16 roots under IBA-K treatment were significantly increased by 3.13% and 24.51% compared with the drought control,respectively.Dry weight and total root length of Hefeng 50 did not reach significant differences compared with its drought control.The MDA content and relative conductivity of Hefeng 50 under the IBA-K treatment were significantly lower than the drought control by 11.80% and 15.09%,and the SOD activity and soluble sugar content were significantly increased by 14.90% and 3.94% compared with the drought control.The relative conductivity,MDA content,SOD activity and soluble sugar content of Kenfeng 16 did not reach significant differences compared with its drought control.The proline content in the roots of two soybean varieties under IBA-K treatment was significantly increased by 10.62% and 10.70% respectively compared with the drought control.IBA-K treatments and different soil moisture treatments had significant or extremely significant effects on the morphology and physiological indexes of the roots of both varieties,and the interaction between the two had no significant regulatory effect.In summary,IBA-K can reduce the MDA content and relative conductivity by increasing root dry matter accumulation,antioxidant enzyme activity and osmotic adjustment substance content,reducing drought stress on soybean roots at the seedling stage.