摘要
为探究不同基因型水稻品种的耐盐性,以常规稻海稻86、弱感光型三系杂交稻博Ⅱ优15、感温型三系杂交稻广8优2168、感温型两系杂交稻深两优58香油占为试验材料,研究了不同NaCl浓度(0、50、100和200 mmol/L)对水稻种子萌发和幼苗生长的影响。结果表明,盐胁迫抑制了种子的萌发,降低了种子的发芽势和发芽率,缩短了根长,减少了根数;在较低盐浓度(50或100 mmol/L)下,部分品种的幼苗鲜干重高于对照,高盐浓度(200 mmol/L)显著降低幼苗的鲜干重;此外,以相对盐害率作为水稻发芽耐盐性的评价指标,海稻86的耐盐性达到“极强”,博II优15和深两优58香油占的耐盐性达到“强”,而广8优2168的耐盐性在4个品种中最弱,属于中等。
To explore the salt tolerance of different rice genotypes,a laboratory experiment was carried out to study the effects of NaCl stress with different concentrations(0,50,100,200 mmol/L)on germination and seedling growth of four rice genotypes,including conventional rice Haidao,weakly photosensitive type three-line hybrid rice BoⅡyou 15,thermo-sensitive type three-line hybrid rice Guang 8 you 2168 and thermo-sensitive type two-line hybrid rice Shenliangyou 58 xiangyouzhan.The results showed that NaCl stress could inhibit the germination of rice seeds,reduce germination energy and germination percentage,shorten root length,decrease root number.Fresh and dry weight of root or shoot were significantly reduced by high concentration of salt solution(250 mmol/L).However,fresh and dry weight of root or shoot didn’t show obvious decrease under lower salt concentration(50,100 mmol/L),and inversely they were increased in some varieties.Moreover,salt tolerance of four rice genotype varieties was evaluated by the relative salt damage rate.Finally,Haidao 86,BoⅡyou 15,Shenliangyou 58 xiangyouzhan and Guang 8 you 2168 had extremely strong,strong,strong and medium salt tolerance,respectively.
作者
曾泳怡
冯梓晴
曾晓靖
翁丽云
李婧潼
饶刚顺
ZENG Yong-yi;FENG Zi-qing;ZENG Xiao-jing(College of Coastal Agricultural Sciences,Guangdong Ocean University,Zhanjiang,Guangdong 524088)
出处
《安徽农业科学》
CAS
2021年第7期25-29,共5页
Journal of Anhui Agricultural Sciences
基金
广东省大学生创新训练项目(CXXL2019055)
广东海洋大学科研启动经费资助项目(R20042)
广东省重点领域研发计划项目(2020B020219004)。
关键词
盐胁迫
水稻
发芽
耐盐评价
相对盐害率
Salt stress
Rice
Germination
Salt tolerance evaluation
Relative salt damage rate
