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Chlorophyll fluorescence and carbohydrate concentration as field selection traits for heat tolerant chickpea genotypes.

التفاصيل البيبلوغرافية
العنوان: Chlorophyll fluorescence and carbohydrate concentration as field selection traits for heat tolerant chickpea genotypes.
المؤلفون: Makonya GM; University of Cape Town, Department of Biological Sciences, Private Bag X3 Rondebosch 7701, South Africa., Ogola JBO; Department of Plant Production, University of Venda, Private Bag X5050, Thohoyandou 0950, South Africa., Muthama Muasya A; University of Cape Town, Department of Biological Sciences, Private Bag X3 Rondebosch 7701, South Africa., Crespo O; University of Cape Town, Climate System Analysis Group, Environmental and Geographical Science Department, Rondebosch, Cape Town 7701, South Africa., Maseko S; Department of Crop Sciences, Tshwane University of Technology, Private Bag X680, Pretoria 0001, South Africa., Valentine AJ; Botany and Zoology Department, University of Stellenbosch, Private Bag X1, Matieland 7602, South Africa., Ottosen CO; Department of Food Science, Aarhus University, Kirstinebjergvej 10, 5792 Aarslev, Denmark., Rosenqvist E; Department of Plant and Environmental Sciences, Section for Crop Science, University of Copenhagen, Hoejbakkegaard Allé 9, 2630 Taastrup, Denmark., Chimphango SBM; University of Cape Town, Department of Biological Sciences, Private Bag X3 Rondebosch 7701, South Africa. Electronic address: samson.chimphango@uct.ac.za.
المصدر: Plant physiology and biochemistry : PPB [Plant Physiol Biochem] 2019 Aug; Vol. 141, pp. 172-182. Date of Electronic Publication: 2019 May 29.
نوع المنشور: Journal Article
اللغة: English
بيانات الدورية: Publisher: Elsevier Science Country of Publication: France NLM ID: 9882449 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1873-2690 (Electronic) Linking ISSN: 09819428 NLM ISO Abbreviation: Plant Physiol Biochem Subsets: MEDLINE
أسماء مطبوعة: Publication: Amsterdam : Elsevier Science
Original Publication: Paris : Gauthier-Villars, c1987-
مواضيع طبية MeSH: Fluorescence* , Genotype*, Carbohydrates/*chemistry , Chlorophyll/*chemistry , Cicer/*genetics , Crop Production/*methods, Acclimatization ; Africa South of the Sahara ; Carbohydrate Metabolism ; Cicer/chemistry ; Genes, Plant ; Hot Temperature ; Phenotype ; Photosynthesis ; Photosystem II Protein Complex/chemistry ; Plant Leaves/chemistry
مستخلص: Chickpea (Cicer arietinum L.), a cool season crop is severely affected by heat stress, predicted to increase due to warming climates. Research for identifying heat tolerance markers for potential chickpea genotype selection is imperative. The study assessed the response of four chickpea genotypes to a natural temperature gradient in the field using chlorophyll fluorescence, non-structural carbohydrate, chlorophyll concentrations, gas exchange and grain yield. Field experiments were carried out in two winter seasons at three locations with known differences in temperature in NE South Africa. Results showed two genotypes were tolerant to heat stress with an F v /F m of 0.83-0.85 at the warmer site, while the two sensitive genotypes showed lower F v /F m of 0.78-0.80. Both dark-adapted F v /F m and F q '/F m ' (where F q ' = F m ' -F) measured at comparable high light levels correlated positively with grain yield. The two tolerant genotypes also showed higher photosynthetic rates, starch, sucrose and grain yield than the sensitive genotypes at the warmer site. However, these parameters were consistently higher at the cooler sites than at the warmer. These results were further validated by a climate chamber experiment, where higher F v /F m decline in the sensitive compared to tolerant genotypes was observed when they were exposed to short-term heat treatments of 30/25 °C and 35/30 °C. Tolerant genotypes had higher F v /F m (0.78-0.81) and grain yield plant -1 (1.12-2.37g) compared to sensitive genotypes (0.74-0.75) and (0.32-0.89g plant -1 ) respectively in the 35/30 °C. It is concluded that chlorophyll fluorescence and leaf carbohydrates are suitable tools for selection of heat tolerant chickpea genotypes under field conditions, while the coolest site showed favourable conditions for chickpea production.
(Copyright © 2019 Elsevier Masson SAS. All rights reserved.)
فهرسة مساهمة: Keywords: Climate change; Heat stress; Leaf carbohydrates; Photochemical efficiency; Temperature gradient; Thermo-tolerance
المشرفين على المادة: 0 (Carbohydrates)
0 (Photosystem II Protein Complex)
1406-65-1 (Chlorophyll)
تواريخ الأحداث: Date Created: 20190608 Date Completed: 20190906 Latest Revision: 20200930
رمز التحديث: 20231215
DOI: 10.1016/j.plaphy.2019.05.031
PMID: 31174034
قاعدة البيانات: MEDLINE
الوصف
تدمد:1873-2690
DOI:10.1016/j.plaphy.2019.05.031