摘要
为了研究在水分胁迫条件下接种根瘤菌对豌豆植株的抗旱性影响,本试验以抗旱性品种‘定豌8号’和非抗旱性品种‘陇豌6号’两个豌豆品种为试验材料,在充分供水(田间持水量的75%)、轻度胁迫(田间持水量的55%)、重度胁迫(田间持水量的35%)3个不同水分胁迫条件下,研究了接种与不接种根瘤菌豌豆植株地上部和根系超氧化物歧化酶(SOD)、过氧化氢酶(CAT)、过氧化物酶(POD)、脯氨酸(Pro)、可溶性糖、丙二醛(MDA)等抗旱指标对水分胁迫的响应。结果表明:根瘤共生的豌豆植株在遭受水分胁迫后,SOD、CAT、POD活性及Pro和可溶性糖含量均高于不接菌处理,而MDA含量低于不接菌处理。接种15735菌的‘定豌8号’的3种酶活性及Pro、可溶性糖含量均高于接种Da99菌株,同时高于接种15735菌株的陇豌6号。经隶属函数综合分析表明:在3个不同的水分胁迫条件下,接种15735菌的‘定豌8号’的隶属函数平均值最大,抗旱性最强。而Da99菌株与‘陇豌6号’共生后在充分和轻度水分胁迫条件下表现出较强的抗旱性,但在重度胁迫下,Da99菌株与定豌8号表现出更强抗旱性。因此,在水分胁迫下接种两种根瘤菌均可提高豌豆的抗旱性,且15735菌对两种豌豆的抗旱性效应强于Da99菌,同时15735菌与‘定豌8号’更匹配,表现出更强的抗旱性。
This research investigated the effect of rhizobia inoculation on drought response of pea(Pisum sativum)plants under water stress.A drought-resistant variety‘Ding wan 8’and a non-drought resistant variety‘Long wan 6’were compared with or without inoculation with rhizobia strains‘15735’or‘Da99’,and under three different water supply conditions:adequate water supply(soil at 75%field capacity),mild stress(soil at 55%field capacity),and severe stress(soil at 35%field capacity),the superoxide dismutase(SOD),catalase(CAT),peroxidase(POD)activity,and proline(Pro),soluble sugar and malondialdehyde(MDA)content in aboveground and root tissues of pea plants under the three water treatments were assayed.It was found after water stress that SOD,POD and CAT activities,and Pro and soluble sugar contents in pea plants inoculated with rhizobia were higher than those without rhizobia inoculation,and in line with those results the content of MDA was lower.Additionally,these responses were more pronounced in‘Ding wan 8’inoculated with rhizobium‘15735’than in the same variety inoculated with rhizobium‘Da99’,and also higher than in‘Long wan 6’inoculated with rhizobium‘15735’.A subordination function analysis showed that‘Ding wan 8’inoculated with‘15735’strain had the highest average score and the strongest drought resistance under the three water treatments.Variety‘Long wan 6’inoculated with the‘Da99’rhizobium strain showed stronger drought resistance under sufficient water and mild water stress treatments.However,under severe water stress,variety‘Ding wan 8’inoculated with‘Da99’rhizobium strain showed stronger drought resistance.The results indicate that inoculation with rhizobia enhanced the drought-resistance of pea plants,and the rhizobium strain‘15735’had a stronger effect than strain‘Da99’,while,the variety‘Ding wan 8’inoculated with rhizobium strain‘15735’still showed greater tolerance to drought than‘Long wan 6’.
作者
马蕾
马绍英
陈贵平
柴强
李胜
MA Lei;MA Shao-ying;CHEN Gui-ping;CHAI Qiang;LI Sheng(College of Agronomy,Gansu Agricultural University,Lanzhou 730070,China;Gansu Provincial Key Laboratory of Arid Land Crop Science,Lanzhou 730070,China;Basic Experimental Educational Center of Gansu Agricultural University,Lanzhou 730070,China;College of Life Science and Technology,Gansu Agricultural University,Lanzhou 730070,China)
出处
《草业学报》
CSCD
北大核心
2019年第9期96-109,共14页
Acta Prataculturae Sinica
基金
国家绿肥产业技术体系(CARS-22-G-12)
H2O2胁迫下豌豆幼苗初生根水平性弯曲机理研究(GAU-XKJS-2018-173)
国家自然基金(31460382)
国家现代农业食用豆产业技术体系(CARS-08)资助
关键词
豌豆
水分胁迫
根瘤共生
生理指标
pea
water stress
symbiotic rhizobium
physiological index
