Screening for drought tolerance in mutant germplasm of sesame (Sesamum indicum) probing by chlorophyll a fluorescence

Sawadogo, Boureima; Oukarroum, Abdallah; Diouf, M.; Cissé, Ndiaga; Damme, Patrick Van

doi:10.1016/j.envexpbot.2012.02.015

Cited by 101 publications

(70 citation statements)

References 29 publications

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“…Previous studies related to drought research in sesame have applied mainly a moderate stress [7,9,10,12,13,[25][26][27], but in fact, in the semi-arid and arid areas where sesame is commonly grown, drought can last several weeks. Hence, in this study, the response of sesame genotypes for long lasting drought stress was emphasized [8,11]. In addition, the originality of the present investigation resides in the fact that (1) it focused on a diverse West and Central African genotypes not yet studied for traits related to drought resistance; and (2) it used an integrated approach by combining agromorphological, physiological, biochemical and seed quality traits to efficiently identify useful genotypes and traits of interest to be targeted for implementing breeding programs in drought-prone environments of West and Central Africa.…”

Section: Discussionmentioning

confidence: 99%

“…However, because the crop is mostly grown under rain fed conditions in arid and semi-arid areas of West and Central Africa, it is often subjected to terminal and intermittent droughts [6]. Despite its relative tolerance to drought stress, severe or prolonged drought is detrimental for the productivity by affecting the number of capsules per plant, grain yield and oil yield and quality as well [7][8][9][10][11][12][13]. Therefore, identifying drought resistant genotypes is of utmost importance for sesame breeding programs in West and Central Africa [14].…”

Section: Introductionmentioning

confidence: 99%

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Comprehensive Screening of Some West and Central African Sesame Genotypes for Drought Resistance Probing by Agromorphological, Physiological, Biochemical and Seed Quality Traits

et al. 2017

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Abstract:Sesame is an important crop in West and Central Africa playing a role of an alternative cash crop for smallholders. However, sesame productivity is highly impaired by drought. This study aimed at identifying some drought-resistant genotypes and efficient screening traits in large sesame germplasm. Ten genotypes were examined based on 21 biochemical, physiological, agromorphological and seed quality traits under three weeks of water stress. A high variability for drought resistance was observed among the genotypes. The genotypes WC17, WC18 and WC14 were drought resistant, WC12, WC13, WC06 and WC03 were moderately drought resistant while, WC02, WC10 and WC08 were drought sensitive, based on principal component analysis. The resistant genotypes exhibited both avoidance and tolerance features including increase of the root system, reduced water loss, highest activity of antioxidative enzymes and accumulation of proline. They produced higher biomass and had higher ability to maintain seed quality under drought stress compared with the sensitive genotypes. Strong accumulation (~200% ratio stress/control) of biochemical markers including superoxide dismutase, ascorbate peroxidase, catalase and proline could be regarded as an important indicator for selecting drought resistant genotypes. This study represents a reference for future research towards developing new varieties with improved drought resistance in West and Central Africa.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Comprehensive Screening of Some West and Central African Sesame Genotypes for Drought Resistance Probing by Agromorphological, Physiological, Biochemical and Seed Quality Traits

et al. 2017

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“…A DFI approach was used by Strauss et al (2006) to detect dark chilling tolerance in soybean genotypes. DFI has also been used to rank drought stress tolerance in 10 barley varieties (Oukarroum et al 2007) and 21 mutant germplasms of sesame (Boureima et al 2012). The most tolerant and the most sensitive races of barley and Sorghum bicolor from Egypt were identified using the PI parameter and the ChlF fast induction curve (Jedmowski et al 2013).…”

Section: Drought Stressmentioning

confidence: 99%

Chlorophyll a fluorescence as a tool to monitor physiological status of plants under abiotic stress conditions

et al. 2016

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Plants living under natural conditions are exposed to many adverse factors that interfere with the photosynthetic process, leading to declines in growth, development, and yield. The recent development of Chlorophyll a fluorescence (ChlF) represents a potentially valuable new approach to study the photochemical efficiency of leaves. Specifically, the analysis of fluorescence signals provides detailed information on the status and function of Photosystem II (PSII) reaction centers, lightharvesting antenna complexes, and both the donor and acceptor sides of PSII. Here, we review the results of fast ChlF analyses of photosynthetic responses to environmental stresses, and discuss the potential scientific and practical applications of this innovative methodology. The recent availability of portable devices has significantly expanded the potential utilization of ChlF techniques, especially for the purposes of crop phenotyping and monitoring.

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“…There are no scientific data about the status of its production in this area, and few research programs are focused on this untapped crop [13]. Therefore, there are many knowledge gaps in the West African sesame production landscape that need to be addressed: What is the socio-economic context of sesame production in West Africa's Sahel?…”

Section: Open Accessmentioning

confidence: 99%

Enhancing sesame production in West Africa’s Sahel: a comprehensive insight into the cultivation of this untapped crop in Senegal and Mali

et al. 2017

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Background: West Africa's Sahel is characterized by a dry and hot climate with limited rainfall that impairs the production of several crops. Sesame is a resilient crop that is well suited to this environment. Unfortunately, there is a lack of data relative to the status of its production in West Africa. We made investigations in four major sesame-growing areas of Senegal and Mali, into the status of the crop's production, its agronomic practices, the challenges farmers face and their preferences concerning the traits that should be improved.Results: A total of 256 sesame producers in 47 villages were interviewed using a semi-structured questionnaire. The results showed that sesame is a multi-ethnic crop and only 20% of the total fields owned by farmers were allocated to its cultivation. The yield and the seasonal production of sesame per farmer was quite weak showing that this crop is still a commodity grown on a small scale. Various cultivars were grown, and the most widely grown ones have considerable levels of oil (53-60.34%) and protein (18-21.89%) contents. In both countries, seed marketing was the main impediment the producers faced on account of a lack of reliable markets and of a considerable fluctuation in prices. Conclusions:Overall, the sesame sector is still traditional but is progressively developing and sesame could become an important cash crop for smallholders in West Africa's Sahel. Research programs should target the release of the varieties with higher yield, a stronger resistance to drought, heat, diseases and pests, a good seed quality and improved plant architecture. This study represents the first insight into the sesame sector in West Africa's Sahel, and our findings may guide researchers and policy-makers to boost this sector for ensuring food security and the improvement of small-scale farmers' livelihood.

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Screening for drought tolerance in mutant germplasm of sesame (Sesamum indicum) probing by chlorophyll a fluorescence

Cited by 101 publications

References 29 publications

Comprehensive Screening of Some West and Central African Sesame Genotypes for Drought Resistance Probing by Agromorphological, Physiological, Biochemical and Seed Quality Traits

Comprehensive Screening of Some West and Central African Sesame Genotypes for Drought Resistance Probing by Agromorphological, Physiological, Biochemical and Seed Quality Traits

Chlorophyll a fluorescence as a tool to monitor physiological status of plants under abiotic stress conditions

Enhancing sesame production in West Africa’s Sahel: a comprehensive insight into the cultivation of this untapped crop in Senegal and Mali

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