新疆农业科学2024，Vol.61Issue(6)：1386-1396,11.DOI:10.6048/j.issn.1001-4330.2024.06.011
高温对不同厚皮甜瓜品种种子萌发的影响及其耐热性综合评价
The impact of high temperature on different thick-skinned melon varieties and comprehensive evaluation of its heat resistance
摘要
Abstract
[Objective]To study the effect of high temperature on the germination of thick skin melon seeds and the differences in high-temperature tolerance among different thick skin melon varieties in the hope of providing theoretical basis for the selection of more high-temperature resistant thick skin melon varieties and the seedling management and promotion application of thick skin melon.[Methods]Five main thick skinned melon varieties in Xinjiang with different heat resistance,Nasmi,Huangpi 9818,Xinmi 14(Xin-hongxincui),Huangmengcui and Kalakesai(Jiashigua),were used as test materials,and treated at 4 temper-atures(28(CK),35,40 and 50℃).The germination potential,germination rate,germination index and ac-tivity index of thick skinned melon seeds at the germination stage were compared.Superoxide dismutase(SOD)The activities of peroxidase(POD),Catalase(CAT),Malondialdehyde(MDA)and proline(Pro)contents were studied.[Results]The seeds of 5 thick skinned melon varieties were able to germinate and grow normally at 28℃,and the germination was relatively neat;At 35℃,muskmelon seeds could germinate faster,but excessive germination led to overgrowth and uneven growth;At 40℃,the germination effect of seeds was similar to that of 35℃,with slight inhibition of growth and acceleration of elongation,but not e-nough to distinguish the differences in heat resistance among varieties;At 50℃,the germination of melon seeds was delayed,and the embryonic roots gradually decayed after germination.The high-temperature inhi-bition effect was significant,and there was a significant difference in germination ability between strains.At 50℃,the antioxidant enzyme activity of varieties with good heat resistance increased,while the antioxidant en-zyme activity of varieties with poor heat resistance decreased.SOD and POD played a greater role than CAT,and the increase in MDA was inversely proportional to heat resistance,while the increase in proline was direct-ly proportional to heat resistance.[Conclusion]The five thick skin melon varieties can be divided into two different heat tolerance levels:heat resistant and heat sensitive.The heat resistant types are Huangmengcui and Nasimi;Heat sensitive type:Huangpi 9818,Xinmi 14,Kalakesai.Three thick skinned melon varieties(Huangmengcui,Nasimi,Huangpi 9818)bred through cross breeding have better heat resistance during seed germination than the other two typical Xinjiang melon landraces(Xinmi 14,Kalakesai).关键词
厚皮甜瓜/高温胁迫/种子萌发/综合评价Key words
thick skin melon/high temperature stress/seed germination/comprehensive evaluation分类
农业科技引用本文复制引用
杨君妍,闫淼,吴海波,杨文莉,王豪杰,毛建才,翟文强,李俊华..高温对不同厚皮甜瓜品种种子萌发的影响及其耐热性综合评价[J].新疆农业科学,2024,61(6):1386-1396,11.基金项目
国家西甜瓜产业技术体系喀什综合试验站(CARS-25) （CARS-25）
自治区天山英才-三农骨干人才-喀什地区"小拱棚西甜瓜育苗移栽促早熟栽培技术研究及示范推广项目"(2022SNGGNT077) （2022SNGGNT077）
新疆现代农业产业技术体系(绿色栽培)(XJARS-06) Comprehensive Experimental Station of National Watermelon Industrial Technology System(CARS-25) （绿色栽培）
Research and Demonstra-tion and Promotion Project of Transplanting watermelon Seedlings to Promote Early Ripening Cultivation Technology of Tianshan Tal-ents of Autonomous Region-Key Talents of agriculture and rural areas in Kashi Region(2022SNGGNT077),Xinjiang Modern Agricultural Industrial Technology System(Green Cultivation)(XJARS-06) （2022SNGGNT077）
