Physiological mechanisms underpinning tolerance to high temperature stress during reproductive phase in mungbean (Vigna radiata (L.) Wilczek)

Patriyawaty, Nia Romania; Rachaputi, Rao C. N.; George, D. L.

doi:10.1016/j.envexpbot.2018.03.022

Cited by 26 publications

(19 citation statements)

References 46 publications

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“…To make spring mungbean a more viable crop option, we need to identify traits that make it more productive in the spring season. Heat tolerance is one such obvious trait [92]. Growing mungbean as a spring crop is becoming common in Asia [93] and could be further encouraged in Australia as well.…”

Section: Conclusion and Future Research Directionsmentioning

confidence: 99%

Physiological and Agronomic Strategies to Increase Mungbean Yield in Climatically Variable Environments of Northern Australia

Chauhan¹,

Williams²

2018

Agronomy

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Mungbean (Vigna radiata (L.) Wilczek) in Australia has been transformed from a niche opportunistic crop into a major summer cropping option for dryland growers in the summer-dominant rainfall regions of Queensland and New South Wales. This transformation followed stepwise genetic improvements in both grain yields and disease resistance. For example, more recent cultivars such as 'Crystal', 'Satin II', and 'Jade-AU' have provided up to a 20% yield advantage over initial introductions. Improved agronomic management to enable mechanised management and cultivation in narrow (<50 cm) rows has further promised to increase yields. Nevertheless, average yields achieved by growers for their mungbean crops remain less than 1 t/ha, and are much more variable than other broad acre crops. Further increases in yield and crop resilience in mungbean are vital. In this review, opportunities to improve mungbean productivity have been analysed at four key levels including phenology, leaf area development, dry matter accumulation, and its partitioning into grain yield. Improving the prediction of phenology in mungbean may provide further scope for genetic improvements that better match crop duration to the characteristics of target environments. There is also scope to improve grain yields by increasing dry matter production through the development of more efficient leaf canopies. This may introduce additional production risks as dry matter production depends on the amount of available water, which varies considerably within and across growing regions in Australia. Improving crop yields by exploiting G × E × M interactions related to cultivar photo-thermal sensitivities and make better use of available water in these variable environments is likely to be a less risky strategy. Improved characterisation of growing environments using modelling approaches could also better define and identify the risks of major abiotic constraints. This would assist in optimising breeding and management strategies to increase grain yield and crop resilience in mungbean for the benefit of growers and the industry.

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Section: Conclusion and Future Research Directionsmentioning

confidence: 99%

Physiological and Agronomic Strategies to Increase Mungbean Yield in Climatically Variable Environments of Northern Australia

Chauhan¹,

Williams²

2018

Agronomy

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“…Heat stress during legume reproduction causes significant loss of seed yield, primarily by compromising seed setting and/or subsequent seed filling (Ruan et al, 2010; Zinn et al, 2010; Hatfield and Prueger, 2015; Siebers et al, 2015; Patriyawaty et al, 2018). It should be noted that failure of seed setting by heat stress imposed at the early reproductive stage cannot be rescued, usually leading to fatal and irreversible yield loss, while compromised seed filling by heat stress imposed at the late reproductive stage may be to some extent recovered by subsequent proper cultivation management.…”

Section: Introductionmentioning

confidence: 99%

Heat Stress in Legume Seed Setting: Effects, Causes, and Future Prospects

Liu

Zhu

et al. 2019

Front. Plant Sci.

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Grain legumes provide a rich resource of plant nutrition to human diets and are vital for food security and sustainable cropping. Heat stress during flowering has a detrimental effect on legume seed yield, mainly due to irreversible loss of seed number. To start with, we provide an overview of the developmental and physiological basis of controlling seed setting in response to heat stress. It is shown that every single process of seed setting including male and female gametophyte development, fertilization, and early seed/fruit development is sensitive to heat stress, in particular male reproductive development in legume crops is especially susceptible. A series of physiochemical processes including heat shock proteins, antioxidants, metabolites, and hormones centered with sugar starvation are proposed to play a key role in regulating legume seed setting in response to heat stress. The exploration of the molecular mechanisms underlying reproductive heat tolerance is in its infancy. Medicago truncatula , with a small diploid genome, and well-established transformation system and molecular platforms, has become a valuable model for testing gene function that can be applied to advance the physiological and molecular understanding of legume reproductive heat tolerance.

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“…However, heat tolerant genotypes can even produce fewer pods up to 40/30° temperature (Sita, Sehgal, Kumar, et al, 2017). In other legume crops such as mung bean and common bean, flowering or just prior to flowering stage has been shown to be highly affected by heat stress (Patriyawaty, Rachaputi, & George, 2018), whereas the post‐fertilization stages like early pod development has been identified more tolerant to heat stress (Gross & Kigel, 1994). Studies demonstrated that high temperature stress, that is, even a few days exposure to high temperature (30–35°C) affects physiological, metabolic, and molecular function of reproductive organs leading to poor seed set or yield (Gaur et al, 2015; Jiang et al, 2015; Sage et al, 2015).…”

Section: Breeding For Heat Tolerancementioning

confidence: 99%

“…Phenotypic and physio‐biochemical traits have been used to identify the heat tolerant genotypes in lentil (Table 1). As heat stress has the most devastating effects on just before/during flowering in legumes (Patriyawaty et al, 2018), the number of filled pods per plant and seed size under heat stress has been used a key indicator trait to assess heat tolerance among genotypes (Kumar et al, 2016; Singh et al, 2017; Sehgal et al 2019, Kumar, Gupta, et al, 2018). In addition to this, different physio‐biochemical traits had been examined to differentiate heat tolerant and heat sensitive genotypes that led to identification of key physiological traits in lentil (Kumar, Gupta, et al, 2018; Sita, Sehgal, HanumanthaRao, et al, 2017).…”

Section: Breeding For Heat Tolerancementioning

confidence: 99%

Breeding, genetics, and genomics for tolerance against terminal heat in lentil: Current status and future directions

2020

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Heat stress at terminal stage in lentil is one of the major factors causing drastic yield loss. Development of heat tolerant cultivars is one of the ways to tackle this problem. However, heat stress tolerance is a complex trait in nature and many morphological, physiological, biochemical, and metabolic changes are responsible for heat stress tolerance in lentil. Therefore, in the past years, efforts have been made to know genetics and genomics of heat stress tolerance in lentil. In this review, we discussed current progress on breeding, genetics, and genomics including quantitative trait locus (QTL) mapping, transcriptomics, proteomics, and network of metabolic pathways for heat tolerance and future directions for developing heat tolerant cultivars in lentil.

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Physiological mechanisms underpinning tolerance to high temperature stress during reproductive phase in mungbean (Vigna radiata (L.) Wilczek)

Cited by 26 publications

References 46 publications

Physiological and Agronomic Strategies to Increase Mungbean Yield in Climatically Variable Environments of Northern Australia

Physiological and Agronomic Strategies to Increase Mungbean Yield in Climatically Variable Environments of Northern Australia

Heat Stress in Legume Seed Setting: Effects, Causes, and Future Prospects

Breeding, genetics, and genomics for tolerance against terminal heat in lentil: Current status and future directions

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