磷酸二氢钾影响马铃薯对晚疫病抗性的初步研究  

A preliminary study on the effects of potassium dihydrogen phosphate on the resistance of potato to late blight

作　　者：张哲 刘霞[1] 王兴国 杨俐 陈丽 黄勋 张雅敏 杨艳丽[1] ZHANG Zhe;LIU Xia;WANG Xingguo;YANG Li;CHEN Li;HUANG Xun;ZHANG Yamin;YANG Yanli(College of Plant Protection,Yunnan Agricultural University,Kunming 650201,China;Dali Station of Plant Protection and Inspection,Yunnan Province,Dali 671000,China)

机构地区：[1]云南农业大学植物保护学院,昆明650201 [2]云南省大理市植保植检站,大理671000

出　　处：《植物保护》2023年第3期85-91,140,共8页Plant Protection

基　　金：云南省重大科技专项(202102AE090018);国家重点研发计划(2018YFD0200808);云南省现代农业马铃薯产业技术体系(2020KJTX03)。

摘　　要：本研究以马铃薯品种‘丽薯6号’为试材,对叶面喷施不同浓度磷酸二氢钾4 d后的植株接种晚疫病菌,测定晚疫病发生的严重度,并测定磷酸二氢钾和晚疫病菌处理后14 d内马铃薯植株的PAL、SOD、POD、PPO、Chi、GLU活性及SP含量。结果表明,在一定浓度范围内,磷酸二氢钾可减轻马铃薯晚疫病的发生,随着施用浓度的增加,晚疫病发病逐渐减轻。其中磷酸二氢钾质量浓度为0.6%时,晚疫病发病最轻,接种晚疫病菌后8 d防效达35.64%,12 d时仍超过30%,但浓度超过0.6%,晚疫病发生加重。同时,喷施磷酸二氢钾可不同程度地提升健康和接种晚疫病菌的马铃薯植株体内6种防御酶活性及可溶性蛋白含量。因此,磷酸二氢钾在一定时间段内可诱导马铃薯对晚疫病的抗性,减轻晚疫病的发生。The potato variety‘Lishu no.6’was sprayed with different concentrations of potassium dihydrogen phosphate.Four days later,the plants were inoculated with Phytophthora infestans to determine the severity of potato late blight.The activities of PAL,SOD,POD,PPO,Chi,GLU and the contents of SP in potato plants were determined within 14 days after treatment.The results showed that potassium dihydrogen phosphate could reduce the occurrence of potato late blight.With increasing application concentrations,the occurrence of potato late blight gradually decreased,but when the concentration exceeded 0.6%,the occurrence of potato late blight became more serious.When the concentration of potassium dihydrogen phosphate was 0.6%,the severity of potato late blight was the least,and the control effect was 35.64%on day eight after treatment,and remained stable(>30%)12 days after treatment.At the same time,spraying potassium dihydrogen phosphate increased the activity of six defense enzymes and soluble protein content to varying degrees in healthy and inoculated potato plants.Therefore,potassium dihydrogen phosphate can induce potato resistance to late blight during specific periods of time,and thus reduce the occurrence of potato late blight.

关 键 词：磷酸二氢钾 马铃薯晚疫病 抗病性 

分 类 号：S432.1[农业科学—植物病理学]