饲用燕麦种质资源萌发期及苗期耐盐性鉴定评价

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引用格式：，等.饲用燕麦种质资源萌发期及苗期耐盐性鉴定评价[J].草地学报，2025，33（11）：3741—3755ZHANG Xiao-peng， DENG Yan-tian， YANG Rui， et al. Evaluation of Salt Tolerance of Forage Oat GermplasmResources at Germination and Seedling Stages[J].Acta Agrestia Sinica，2O25，33（11） ：3741-3755

中图分类号：S544.9 文献标识码：A 文章编号：1007-0435（2025）11-3741-15

Evaluation of Salt Tolerance of Forage Oat Germplasm Resources at Germination and Seedling Stages

ZHANG Xiao-peng， DENG Yan-tian，YANG Rui，KANG Jun-mei， ZHANG Tie-jun’， GUO Qian-qian（1.CollegeofndeeiFrestrUivesityi，ina;2siuteofAialieedecultural Sciences，Beijing 1Oo193，China）

Abstract：To screen salt-tolerance of oat germplasm，this study used 2O oat germplasm materials from diferent sources as experimental materials. These materials were treated with 200mmol⋅L-1 NaCl at germination and sedling stages，using distiled water as the control. During the seed germination period，germination rate， fresh weight of the germ and root，dry weight of the germ and root，lengths of the germ and root，and root number were measured.At the seedling stage，morphological indices were measured，including fresh weight of leaves，fresh weight of roots，dryweight of leaves，dry weight of roots，lengths of leaves，root length，and root number. Several physiological indices，including malondialdehyde（MDA），superoxide dismutase（SOD）， catalase（CAT），peroxidase （POD），proline，and soluble sugars，were also measured at the seedling stage. The results showed that under 200mmol⋅L-1NaCl treatment，the morphological indices at both the germination and seedling stages decreased to varying extents，and physiological indices exhibited either increasing or decreasing trends across all materials.Principal component analysis indicated that the fresh weight and lengthof the germ root，and the length of the germ could serve as comprehensive indices for evaluating salt tolerance during oat germination. The dry and fresh weight of roots，MDA，SOD，CAT，POD，proline，and soluble sugars could serve as comprehensive indices for evaluating salt tolerance during the seedling stage. Based on comprehensive evaluation（D value），salt-tolerant materials （k2OO and kl55）and salt-sensitive materials （k13 and k55）were selected.This study provides a theoretical basisand foundational materials for breeding salt-tolerant forage oat varieties and improving salt tolerance evaluation methods. Key words：Avena sativa L. ;Genetic resources;Salt stress;Synthesized assessment

土壤盐碱化已成为全球农业生产的重要限制因素。（剩余20419字）