摘要
以红小豆品种珍珠红为供试材料,在可移动防雨棚中采用盆栽称重法于V2期模拟干旱胁迫,设置正常供水(对照,维持80%田间持水量)、干旱胁迫下喷施褪黑素处理(于控水当天叶面喷施100μmol/L褪黑素,逐步控制并维持50%田间持水量)和干旱胁迫处理(控水方式同上,喷施等量蒸馏水),研究了干旱胁迫下褪黑素对红小豆幼苗抗旱和光合生理、形态和产量的调控效应。结果表明,褪黑素可以显著提高干旱胁迫下红小豆叶片中抗氧化酶活性和渗透调节物质含量,降低活性氧和丙二醛含量,并提高株高、茎粗、叶面积和干物质积累。褪黑素可显著提高干旱胁迫下红小豆叶片光合色素含量、光合速率和叶绿素荧光参数,提高碳水化合物(蔗糖、果糖、可溶性糖)含量,可在一定程度上提高单株荚数和单株粒数,较干旱胁迫处理分别提高了2.18%和4.88%。综合分析认为,叶面喷施100μmol/L褪黑素可提高红小豆抗旱能力,缓解干旱胁迫对红小豆光合作用的抑制,促进红小豆幼苗生长,提高产量。
Adzuki bean cultivar Pearl Red was used as the test material in pot under portable rainproof shed,and normal water supply as control(80%field water holding),melatonin treatment under drought stress(100μmol/L melatonin was sprayed on the day of water control beginning,soil water content was gradually regulated and maintained 50%field capacity),drought stress treatment(equal amount of water was sprayed on the day of water control beginning,soil water content was gradually regulated and maintained 50%field capacity),to study effects of melatonin on drought resistance,photosynthetic physiology,morphology and yield of adzuki bean under drought stress.The results showed that melatonin could significantly increase antioxidant enzyme activity and infiltration regulators,decrease reactive oxygen species(ROS)and malonaldehyde contents,and increase plant height,stem diameter,leaf area and dry matter accumulation under drought stress.Melatonin significantly increased the content of photosynthetic pigment,photosynthetic rate,chlorophyll fluorescence parameters and carbohydrates(sucrose,fructose,soluble sugar)in adzuki bean leaves under drought stress.The application of exogenous melatonin increased the number of pods and grains per plant by 2.18%and 4.88%,respectively,compared with drought stress.It was concluded that 100μmol/L melatonin spraying on leaf surface could improve the drought resistance of adzuki bean,reduce the inhibition of photosynthesis of adzuki bean by drought stress,promote the growth of adzuki bean seedling and increase yield.
作者
姜珊
刘佳
曹亮
任春元
金喜军
张玉先
Jiang Shan;Liu Jia;Cao Liang;Ren Chunyuan;Jin Xijun;Zhang Yuxian(College of Agronomy,Heilongjiang Bayi Agricultural University,Daqing 163319,Heilongjiang,China)
出处
《作物杂志》
北大核心
2023年第4期202-209,共8页
Crops
基金
大庆地区小豆机械化高产关键技术研究与示范(zd-2021-81)
黑龙江八一农垦大学研究生创新科研项目(YJSCX2021-Y44)。
关键词
红小豆
干旱胁迫
褪黑素
光合作用
Adzuki bean
Drought stress
Melatonin
Photosynthesis
