摘要
山兰稻(Oryza sativa L.)是海南少数民族保留下来的特殊稻质资源,具有抗旱,抗病虫害等抗性特点。为进一步研究海南山兰稻的其他抗性生理,本试验使用浓度为5%、10%、15%和20%的海水与NaCl分别对山兰稻种子进行浸种与苗期培养,通过对种子的发芽率与幼苗生长期间其形态与生理指标的变化进行分析,以期探索出山兰稻对盐胁迫的响应。结果表明,于培养3 d短时间内,海水与NaCl对山兰稻种子萌发抑制效果随着浓度的增加而作用增强。对幼苗生长影响表现为5%低浓度的海水促进山兰稻幼苗的生长,茎的增粗,根的伸长,而随着盐浓度增加,对山兰稻幼苗生长则抑制作用不断增强。浓度为15%以下的海水和浓度为5%的NaCl提高山兰稻幼苗地上与地下部分的鲜重。盐胁迫下会减少地上与地下部分干物质的积累,降低叶绿素含量与根系活力。浓度为15%以下的盐胁迫会提高山兰稻幼苗中SOD酶活性,浓度为20%盐胁迫会促进POD酶活性的提高。
Shanlan upland rice(Oryza sativa L.) is a special rice resource preserved by Hainan ethnic groups, which has the characteristics of drought resistance, disease resistance and insect resistance. In order to further study the widely resistance physiology of Hainan Shanlan upland rice, using sea water and NaCl of 5%, 10%, 15% and 20%respectively for soaking seeds and seedling cultivation, then seed germination rate and the changes of morphological and physiological indexes during seedling growth were analyzed to explore the response of Shanlan upland rice to salt stress. The results showed that the inhibition effect of seawater and NaCl on the germination of seed increased with increasing concentration in the three days. The effect on seedling growth showed that 5% low concentration of seawater was beneficial to promote the growth of Shanlan up rice seedlings, stem thickening and root elongation,but the inhibition increased. With the increase of salt concentration. Seawater with concentration below 15% and NaCl with concentration of 5% were beneficial to increase fresh weight of above-ground and below-ground parts of Shanlan upland rice seedlings. Under salt stress, accumulation of dry matter, chlorophyll content and root activity in above-ground and below-ground parts were reduced. The activity of SOD in Shanlan rice seedlings was increased under 15% salt stress, and the activity of POD was increased under 20% salt stress.
作者
周述波
贺立红
林伟
贺立静
陈丽嫚
黎明
Zhou Shubo;He Lihong;Lin Wei;He Lijing;Chen Liman;Li Ming(College of Ecology and Environment,Hainan Tropical Ocean University,Sanya,572022;College of Agriculture and Biology,Zhongkai University of Agriculture and Engineering,Guangzhou,510225;College of Fisheries and Life,Hainan Tropical Ocean University,Sanya,572022)
出处
《分子植物育种》
CAS
CSCD
北大核心
2020年第14期4740-4746,共7页
Molecular Plant Breeding
基金
海南省自然科学基金海南省基础与应用基础研究计划项目(319MS065)
海南省高等学校科学研究项目(Hnky2019-60)共同资助。
