{"title":"Insight into the Physiological Traits Underlying the Genotypic Differences in Response of Durum Wheat (Triticum durum Desf.) to Boron Availability","authors":"N. Baccari, A. Krouma","doi":"10.1134/s1021443724604464","DOIUrl":null,"url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>Boron (B) is a critical element for plant growth. Its role in plant physiology is still being debated. B deficiency, toxicity, and optimality for crop growth and yield are challenging. The specific needs of wheat for B and how tolerant genotypes act are still lacking. Analyze the physiological behavior of three durum wheat (<i>Triticum durum</i> Desf.) genotypes (khiar, maali, and razek) regarding B availability in the rhizosphere and highlight useful traits of tolerance. The experiment was conducted in a potted greenhouse under natural light. Plants were irrigated with a nutrient solution with different B concentrations (0–200 µM). Plant growth, photosynthesis and gas exchange, SPAD index, B distribution and interrelationships were deeply analyzed. Durum wheat genotypes expressed their maximum growth and normal metabolic functioning at 80 μM of B in the rhizosphere. B deficiency as well as toxicity significantly reduced plant growth, net photosynthesis, and SPAD index. These metabolic reactions are strictly dependent (positively or negatively) on the shoot B concentration. The genotype khiar was revealed to be tolerant to B deficiency by developing better B use efficiency for plant growth (BUE-DW), important tolerance index (TI) and effective mechanisms of B management to support the metabolic need for this nutrient under deficient conditions and by sequestering B in roots under toxicity. Although they have the same optimal concentration (80 µM), durum wheat genotypes respond differently to B availability. The identified physiological traits, BUE-DW and TI, determine the genotypic differences in response to B deficiency or toxicity.</p>","PeriodicalId":21477,"journal":{"name":"Russian Journal of Plant Physiology","volume":"11 1","pages":""},"PeriodicalIF":1.1000,"publicationDate":"2024-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Russian Journal of Plant Physiology","FirstCategoryId":"99","ListUrlMain":"https://doi.org/10.1134/s1021443724604464","RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"PLANT SCIENCES","Score":null,"Total":0}
引用次数: 0
Abstract
Boron (B) is a critical element for plant growth. Its role in plant physiology is still being debated. B deficiency, toxicity, and optimality for crop growth and yield are challenging. The specific needs of wheat for B and how tolerant genotypes act are still lacking. Analyze the physiological behavior of three durum wheat (Triticum durum Desf.) genotypes (khiar, maali, and razek) regarding B availability in the rhizosphere and highlight useful traits of tolerance. The experiment was conducted in a potted greenhouse under natural light. Plants were irrigated with a nutrient solution with different B concentrations (0–200 µM). Plant growth, photosynthesis and gas exchange, SPAD index, B distribution and interrelationships were deeply analyzed. Durum wheat genotypes expressed their maximum growth and normal metabolic functioning at 80 μM of B in the rhizosphere. B deficiency as well as toxicity significantly reduced plant growth, net photosynthesis, and SPAD index. These metabolic reactions are strictly dependent (positively or negatively) on the shoot B concentration. The genotype khiar was revealed to be tolerant to B deficiency by developing better B use efficiency for plant growth (BUE-DW), important tolerance index (TI) and effective mechanisms of B management to support the metabolic need for this nutrient under deficient conditions and by sequestering B in roots under toxicity. Although they have the same optimal concentration (80 µM), durum wheat genotypes respond differently to B availability. The identified physiological traits, BUE-DW and TI, determine the genotypic differences in response to B deficiency or toxicity.
期刊介绍：
Russian Journal of Plant Physiology is a leading journal in phytophysiology. It embraces the full spectrum of plant physiology and brings together the related aspects of biophysics, biochemistry, cytology, anatomy, genetics, etc. The journal publishes experimental and theoretical articles, reviews, short communications, and descriptions of new methods. Some issues cover special problems of plant physiology, thus presenting collections of articles and providing information in rapidly growing fields. The editorial board is highly interested in publishing research from all countries and accepts manuscripts in English.
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号
