Evaluation of Salt Tolerance in Italian Ryegrass at Different Developmental Stages
Soil salinity is one of the major abiotic stresses that continues to threaten plant growth and agricultural productivity. Screening germplasm with salinity tolerance is therefore necessary. This study was designed to evaluate salt tolerance based on the integrated tolerance index. Fifteen Italian ry...
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| Format: | Article |
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MDPI AG
2021-07-01
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| Series: | Agronomy |
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| Online Access: | https://www.mdpi.com/2073-4395/11/8/1487 |
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| author | Yan Xie Xiaoying Liu Maurice Amee Hua Yu Ye Huang Xiaoning Li Liang Chen Jinmin Fu Xiaoyan Sun |
| author_facet | Yan Xie Xiaoying Liu Maurice Amee Hua Yu Ye Huang Xiaoning Li Liang Chen Jinmin Fu Xiaoyan Sun |
| author_sort | Yan Xie |
| collection | DOAJ |
| description | Soil salinity is one of the major abiotic stresses that continues to threaten plant growth and agricultural productivity. Screening germplasm with salinity tolerance is therefore necessary. This study was designed to evaluate salt tolerance based on the integrated tolerance index. Fifteen Italian ryegrass cultivars were used to evaluate the degree of genotypic variation in salt tolerance at the germination and vegetative growth stages of plant development. Evident variations in salt tolerance were observed at the germination stage under 255 mM NaCl treatment. Root growth rate, chlorophyll content, and germination rates played a vital role in determining salt tolerance. Based on combined attributes at the germination and vegetative growth stages, Gongniu, Chuangnong, Splendor, and Abundant were identified as the most tolerant cultivars. Furthermore, the constant crude protein, lower neutral detergent fiber, and acid detergent fiber contents were measured under salinity. Compared to the control, the cultivars Tetragold, Abundant, Splendor, Muyao, Harukaze, Tegao, Dongmu 70, and Doraian were identified to have high forage quality under salt stress. Finally, we selected Splendor and Abundant as the cultivars that expressed the highest degree of salt tolerance based on combined attributes related to germination, salt tolerance, and overall forage quality. In addition, gene expression analysis between salinity tolerant and sensitive cultivars revealed that the gene response to photosystem and carbohydrate synthesis may have played a mediating role in providing tolerance to salt stress. |
| first_indexed | 2024-03-10T09:05:00Z |
| format | Article |
| id | doaj.art-20dc376694804fe1aa4b62332d1b9668 |
| institution | Directory Open Access Journal |
| issn | 2073-4395 |
| language | English |
| last_indexed | 2024-03-10T09:05:00Z |
| publishDate | 2021-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Agronomy |
| spelling | doaj.art-20dc376694804fe1aa4b62332d1b96682023-11-22T06:24:31ZengMDPI AGAgronomy2073-43952021-07-01118148710.3390/agronomy11081487Evaluation of Salt Tolerance in Italian Ryegrass at Different Developmental StagesYan Xie0Xiaoying Liu1Maurice Amee2Hua Yu3Ye Huang4Xiaoning Li5Liang Chen6Jinmin Fu7Xiaoyan Sun8CAS Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan 430074, ChinaCAS Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan 430074, ChinaCAS Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan 430074, ChinaCAS Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan 430074, ChinaCAS Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan 430074, ChinaSchool of Resources and Environmental Engineering, Ludong University, Yantai 264025, ChinaCAS Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan 430074, ChinaSchool of Resources and Environmental Engineering, Ludong University, Yantai 264025, ChinaJiangxi Engineering and Technology Research Center for Ecological Remediation of Heavy Metal Pollution, Institute of Microbe, Jiangxi Academy of Sciences, Nanchang 330096, ChinaSoil salinity is one of the major abiotic stresses that continues to threaten plant growth and agricultural productivity. Screening germplasm with salinity tolerance is therefore necessary. This study was designed to evaluate salt tolerance based on the integrated tolerance index. Fifteen Italian ryegrass cultivars were used to evaluate the degree of genotypic variation in salt tolerance at the germination and vegetative growth stages of plant development. Evident variations in salt tolerance were observed at the germination stage under 255 mM NaCl treatment. Root growth rate, chlorophyll content, and germination rates played a vital role in determining salt tolerance. Based on combined attributes at the germination and vegetative growth stages, Gongniu, Chuangnong, Splendor, and Abundant were identified as the most tolerant cultivars. Furthermore, the constant crude protein, lower neutral detergent fiber, and acid detergent fiber contents were measured under salinity. Compared to the control, the cultivars Tetragold, Abundant, Splendor, Muyao, Harukaze, Tegao, Dongmu 70, and Doraian were identified to have high forage quality under salt stress. Finally, we selected Splendor and Abundant as the cultivars that expressed the highest degree of salt tolerance based on combined attributes related to germination, salt tolerance, and overall forage quality. In addition, gene expression analysis between salinity tolerant and sensitive cultivars revealed that the gene response to photosystem and carbohydrate synthesis may have played a mediating role in providing tolerance to salt stress.https://www.mdpi.com/2073-4395/11/8/1487Italian ryegrasssalt toleranceevaluationgermination stagevegetative growth stageforage quality |
| spellingShingle | Yan Xie Xiaoying Liu Maurice Amee Hua Yu Ye Huang Xiaoning Li Liang Chen Jinmin Fu Xiaoyan Sun Evaluation of Salt Tolerance in Italian Ryegrass at Different Developmental Stages Agronomy Italian ryegrass salt tolerance evaluation germination stage vegetative growth stage forage quality |
| title | Evaluation of Salt Tolerance in Italian Ryegrass at Different Developmental Stages |
| title_full | Evaluation of Salt Tolerance in Italian Ryegrass at Different Developmental Stages |
| title_fullStr | Evaluation of Salt Tolerance in Italian Ryegrass at Different Developmental Stages |
| title_full_unstemmed | Evaluation of Salt Tolerance in Italian Ryegrass at Different Developmental Stages |
| title_short | Evaluation of Salt Tolerance in Italian Ryegrass at Different Developmental Stages |
| title_sort | evaluation of salt tolerance in italian ryegrass at different developmental stages |
| topic | Italian ryegrass salt tolerance evaluation germination stage vegetative growth stage forage quality |
| url | https://www.mdpi.com/2073-4395/11/8/1487 |
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