人工老化处理对水稻种子生理生化特性的影响  

Effects of artificial aging treatment on the physiological and biochemical characteristics of rice seeds

作　　者：王东元 WANG Dongyuan(Tianjin Jin’an Ecological Agriculture Technology Development Co.,Ltd.,Tianjin 300350,China)

机构地区：[1]天津金岸生态农业科技发展有限公司,天津300350

出　　处：《安徽农学通报》2024年第23期5-11,共7页Anhui Agricultural Science Bulletin

摘　　要：本试验以LQ183、LQ189和LQ192等8个水稻品种为材料,运用人工模拟种子老化方法(温度43℃,湿度99%),探究老化水稻种子的浸出液电导率、过氧化物酶(POD)活性和单粒核苷酸含量等指标变化,研究人工老化处理对其生理生化特性的影响。结果表明,不同老化处理天数的水稻种子的浸出液电导率间差异具有统计学意义(P<0.01),随着老化处理天数增加,其浸出液电导率逐渐上升;POD活性随着老化处理天数增加呈现出不同的变化趋势,但最终都呈降低趋势;单粒核苷酸的含量随着老化处理天数的增加未展现出现明显的线性关系;随着老化处理天数的逐渐增加,种子活力逐渐下降,种子内部丙二醛(MDA)含量逐渐增加;不同品种水稻种子的可溶性蛋白含量变化趋势不同,部分品种先增加后减少,部分品种先减少后增加;水稻种子的可溶性糖含量呈上升趋势。综合发现,种子浸出液电导率、MDA含量和可溶性糖含量3个指标可作为评定水稻种子质量和耐储藏特性的重要指标。8 rice varieties,including LQ183,LQ189 and LQ192 were used as materials,the artificial simulation of seed aging method(temperature 43℃,humidity 99%)was adopted,to investigate the changes in leaching conductivity,peroxidase(POD)activity,and single nucleotide content of aged rice seeds,and investigate the effects of artificial aging treatment on their physiological and biochemical characteristics.The results showed that there was a statistically significant difference in the conductivity of rice seed leachate with different aging treatment days(P<0.01),and the conductivity of the leachate gradually increased with the extension of aging days;The POD enzyme activity showed different trends with the extension of aging days,but ultimately showed a decreasing trend;The content of single nucleotide did not show a significant linear relationship with the extension of aging treatment days;With the gradual extension of aging days,seed vitality gradually decrease,and the content of malondialdehyde(MDA)inside the seeds will gradually increase;The trend of soluble protein content in rice seeds varies among different varieties,with some varieties showed an increase followed by a decrease,while others showed a decrease followed by an increase;The soluble sugar content of rice seeds was on the rise.It was found that the conductivity of the leachate,MDA content,and soluble sugar content of seed leachate could be important indicators for evaluating the quality and storage tolerance of rice seeds.

关 键 词：人工老化 水稻种子 生理生化特性 储藏特性 

分 类 号：S511[农业科学—作物学]