摘要
为了明确盐碱(模拟海水)胁迫对不同小麦品种萌发相关性状的影响,以4个小麦品种为材料,设0.0(CK)、0.2、0.4、0.6、0.8、1.0倍标准盐度模拟海水溶液进行胁迫,分析4个小麦品种萌发期耐盐碱性差异,并确定小麦萌发期模拟海水胁迫的最适筛选浓度。结果表明,盐碱胁迫对津农7号和中麦998相对发芽势和相对发芽率的抑制小于泰农18和济麦229,4个品种均随盐碱浓度的增加受到的抑制越严重。与CK相比,4个小麦品种的相对芽长、相对最大根长和相对芽鲜重在胁迫下均显著降低,且随浓度的增加受到抑制越严重,其中中麦998受到抑制最小,济麦229受抑制最大,当浓度增加到0.8倍时4个品种均不能发芽。盐碱胁迫对4个品种相对根鲜重的影响存在较大差异,影响最小的为津农7号。与CK相比,津农7号和济麦229的相对根冠比在盐碱胁迫下显著增加,且在0.4倍浓度时津农7号(250.63)高于其他品种。综合分析表明,津农7号和中麦998为耐盐碱型品种,泰农18为中间型品种,济麦229为盐碱敏感型品种,0.4倍浓度为小麦萌发期耐盐碱性筛选的适宜浓度。小麦萌发期7个盐碱相关性状间除相对根冠比与相对发芽势、相对芽长、相对最大根长、相对芽鲜重间相关性不显著外,其余均存在显著或极显著相关性。
In order to clarify the effects of saline-alkali(simulated seawater)stress on germination relatedtraitsof different wheat varieties,four wheat varieties were used as materials,simulated seawater solutions with0.0(CK),0.2,0.4,0.6,0.8 and 1.0 times standard salinity were used for stress,and the ideal screening concentrationof simulated seawater stress at the germination stage was determined by analyzing the differences in salinitytolerance during germination of four wheat varieties.The results showed that Jinnong 7 and Zhongmai 998showed much less inhibition in the relative germination potential and relative germination rate comparedtoTainong 18 and Jimai 229 under saline-alkali stress,and the inhibition of the four varieties was more serious withthe increase of saline-alkali concentration.The relative shoot length,relative maximum root length and relativeshoot fresh weight of the four wheat varieties decreased significantly under stress compared to CK,andtheinhibition was more serious with the increase of saline-alkali concentration,among which Zhongmai 998 was theleast inhibited,and Jimai 229 was the most inhibited.When the concentration was increased to 0.8 times,all four wheat varieties could not germinate.The effects of saline-alkali stress on relative root fresh weight of four varieties were significantly different,and Jinnong 7 was the least affected.Compared with CK,the relativeroot-shoot ratio of Jinnong 7 and Jimai 229 increased significantly under saline-alkali stress,and under 0.4 timesconcentration,Jinnong 7(250.63)was higher than those of other varieties.Comprehensive analysis showedthat Jinnong 7 and Zhongmai 998 were saline-alkali tolerant varieties,Tainong 18 was intermediate variety,and Jimai 229 was saline-alkali sensitive varieties,the 0.4 times concentration was the suitable concentration for screeningwheat saline-alkali tolerance during germination stage.The correlations between relative root-shoot ratioandrelative germination potential,relative shoot length,relative maximum root length,and relative shoot freshweight were not significant,but there were significant or extremely significant correlations among other indexesof seven saline-alkali related characteristics at wheat germination stage.
作者
李菡
赵玉雪
周小可
李云
郭振清
王健
韩玉翠
林小虎
Li Han;Zhao Yuxue;Zhou Xiaoke;Li Yun;Guo Zhenqing;Wang Jian;Han Yucui;LinXiaohu(College of Agronomy and Biotechnology,Hebei Normal University of Science and Technology/Hebei Key Laboratory of Crop Stress Biology,Qinhuangdao 066004,Hebei,China;Research Center of Rural Vitalization,Hebei Normal University of Science and Technology,Qinhuangdao 066004,Hebei,China)
出处
《作物杂志》
北大核心
2024年第4期96-102,共7页
Crops
基金
河北省高等学校科学技术研究项目(ZC2022038)。
关键词
小麦
萌发期
盐碱胁迫
模拟海水
Wheat
Germination period
Saline-alkali stress
Simulated seawater