Breeding Progress and Future Challenges: Abiotic Stresses

Douglas, Col; Pratap, Aditya; Rao, Bindumadhava Hanumantha; Manu, B.; Dubey, Sudhisha; Singh, Parikshit; Tomar, Rakhi

doi:10.1007/978-3-030-20008-4_6

Cited by 17 publications

(17 citation statements)

References 40 publications

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“…Mungbean and blackgram are both considered highly sensitive to soil waterlogging, mainly during the early stages of growth (Bansal et al, 2019 ; Douglas et al, 2020 ). Crops can often be exposed to transient waterlogging during their growth cycle due to extreme weather events (i.e., intense storms bringing rain) and poor soil drainage.…”

Section: Introductionmentioning

confidence: 99%

Response of Mungbean (cvs. Celera II-AU and Jade-AU) and Blackgram (cv. Onyx-AU) to Transient Waterlogging

et al. 2021

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Mungbean [Vigna radiata (L.) Wilczek] and blackgram [Vigna mungo (L.) Hepper] are important crops for smallholder farmers in tropical and subtropical regions. Production of both crops is affected by unexpected and increasingly frequent extreme precipitation events, which result in transient soil waterlogging. This study aimed to compare the waterlogging tolerance of mungbean and blackgram genotypes under the varying duration of waterlogging stress at germination and seedling stages. We evaluated the responses to different durations of transient waterlogging in a sandy clay loam under temperature-controlled glasshouse conditions. Waterlogging durations were 0, 1, 2, 3, 4, 5, 6, 7, and 8 days during germination and 0, 2, 4, 8, and 16 days during the seedling stage. We used two mungbean genotypes (green testa), Celera II-AU (small-seeded), and Jade-AU (large-seeded), contrasting in seed size and hypocotyl pigmentation, and a blackgram genotype (black testa), Onyx-AU. Waterlogging reduced soil redox potential, delayed or even prevented germination, decreased seedling establishment, and affected shoot and root development. In the seedlings waterlogged (WL) at 15 days after sowing (DAS), adventitious root formation and crown nodulation varied between the genotypes, and 16 days of waterlogging substantially reduced growth but did not result in plant death. Plants in soil with waterlogging for 8–16 days followed by drainage and sampling at 39 DAS had reduced shoot and root dry mass by 60–65% in mungbean and 40% in blackgram compared with continuously drained controls, due at least in part to fewer lateral roots. Soil plant analysis development (SPAD) chlorophyll content was also reduced. Onyx-AU, a blackgram genotype, was more tolerant to transient waterlogging than Jade-AU and Celera II-AU in both growth stages. Of the two mungbean genotypes, Celera II-AU had a greater seedling establishment than Jade-AU post waterlogging imposed at sowing. In contrast, Jade-AU had more plant biomass and greater recovery growth than Celera II-AU after waterlogging and recovery during the seedling stage. Both species were delayed in emergence in response to the shorter periods of transient waterlogging at germination, and with the longer waterlogging germination and emergence failed, whereas at the seedling stage both showed adaptation by the formation of adventitious roots.

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Section: Introductionmentioning

confidence: 99%

Response of Mungbean (cvs. Celera II-AU and Jade-AU) and Blackgram (cv. Onyx-AU) to Transient Waterlogging

et al. 2021

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“…In these studies, genotypes such as EC693357, EC693358, Harsha, and ML1299 were found to be heat tolerant, and KPS1, EC693363, NM92, and VC6372 were sensitive. Of several abiotic constraints, high temperature, and drought stresses go hand-in-hand, implying an increase in air temperatures tending to heat up soil temperatures, thereby depleting soil moisture (Bindumadhava et al, 2016 ; Priya et al, 2019 ; Douglas et al, 2020 ). Any crop/plant genotypes withstand high temperatures through organizing or reorganizing intrinsic cellular mechanisms, and could manage soil moisture stress better (Bindumadhava et al, 2016 ; Nair et al, 2019 ; Douglas et al, 2020 ).…”

Section: Discussionmentioning

confidence: 99%

“…Of several abiotic constraints, high temperature, and drought stresses go hand-in-hand, implying an increase in air temperatures tending to heat up soil temperatures, thereby depleting soil moisture (Bindumadhava et al, 2016 ; Priya et al, 2019 ; Douglas et al, 2020 ). Any crop/plant genotypes withstand high temperatures through organizing or reorganizing intrinsic cellular mechanisms, and could manage soil moisture stress better (Bindumadhava et al, 2016 ; Nair et al, 2019 ; Douglas et al, 2020 ). There is also a consensus that drought-sensitive genotypes experience a sense of high temperature stress when water is withdrawn from their stress thresholds (Sheshshayee et al, 2003 ; Bindumadhava et al, 2016 ; Douglas et al, 2020 ).…”

Section: Discussionmentioning

confidence: 99%

“…Any crop/plant genotypes withstand high temperatures through organizing or reorganizing intrinsic cellular mechanisms, and could manage soil moisture stress better (Bindumadhava et al, 2016 ; Nair et al, 2019 ; Douglas et al, 2020 ). There is also a consensus that drought-sensitive genotypes experience a sense of high temperature stress when water is withdrawn from their stress thresholds (Sheshshayee et al, 2003 ; Bindumadhava et al, 2016 ; Douglas et al, 2020 ). Similarly, the genotypes that perform well under the soil moisture depletion can handle high temperature stress effectively as a strategic synergy at molecular and gene levels, which have been amply suggested and demonstrated (Bindumadhava et al, 2016 ; Priya et al, 2019 ; Chaudhary et al, 2020 ).…”

Section: Discussionmentioning

confidence: 99%

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Use of Phenomics for Differentiation of Mungbean (Vigna radiata L. Wilczek) Genotypes Varying in Growth Rates Per Unit of Water

et al. 2021

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In the human diet, particularly for most of the vegetarian population, mungbean (Vigna radiata L. Wilczek) is an inexpensive and environmentally friendly source of protein. Being a short-duration crop, mungbean fits well into different cropping systems dominated by staple food crops such as rice and wheat. Hence, knowing the growth and production pattern of this important legume under various soil moisture conditions gains paramount significance. Toward that end, 24 elite mungbean genotypes were grown with and without water stress for 25 days in a controlled environment. Top view and side view (two) images of all genotypes captured by a high-resolution camera installed in the high-throughput phenomics were analyzed to extract the pertinent parameters associated with plant features. We tested eight different multivariate models employing machine learning algorithms to predict fresh biomass from different features extracted from the images of diverse genotypes in the presence and absence of soil moisture stress. Based on the mean absolute error (MAE), root mean square error (RMSE), and R squared (R2) values, which are used to assess the precision of a model, the partial least square (PLS) method among the eight models was selected for the prediction of biomass. The predicted biomass was used to compute the plant growth rates and water-use indices, which were found to be highly promising surrogate traits as they could differentiate the response of genotypes to soil moisture stress more effectively. To the best of our knowledge, this is perhaps the first report stating the use of a phenomics method as a promising tool for assessing growth rates and also the productive use of water in mungbean crop.

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“…Mungbean, in comparison to other pulse crops, is relatively heat and drought tolerant, but their production is still affected by severe abiotic stresses, such as low or high temperatures [ 10 ], insufficient or excessive water [ 11 , 12 ], high salinity [ 10 ], low soil fertility [ 13 ] and polluted heavy metal-containing soils [ 14 , 15 ] and ultraviolet-B (UV-B) radiation [ 16 ].…”

Section: Introductionmentioning

confidence: 99%

Assessment of root phenotypes in mungbean mini-core collection (MMC) from the World Vegetable Center (AVRDC) Taiwan

et al. 2021

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Mungbean (Vigna radiata L.) is an important food grain legume, but its production capacity is threatened by global warming, which can intensify plant stress and limit future production. Identifying new variation of key root traits in mungbean will provide the basis for breeding lines with effective root characteristics for improved water uptake to mitigate heat and drought stress. The AVRDC mungbean mini core collection consisting of 296 genotypes was screened under modified semi-hydroponic screening conditions to determine the variation for fourteen root-related traits. The AVRDC mungbean mini core collection displayed wide variations for the primary root length, total surface area, and total root length, and based on agglomerative hierarchical clustering eight homogeneous groups displaying different root traits could be identified. Germplasm with potentially favorable root traits has been identified for further studies to identify the donor genotypes for breeding cultivars with enhanced adaptation to water-deficit stress and other stress conditions.

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Breeding Progress and Future Challenges: Abiotic Stresses

Cited by 17 publications

References 40 publications

Response of Mungbean (cvs. Celera II-AU and Jade-AU) and Blackgram (cv. Onyx-AU) to Transient Waterlogging

Response of Mungbean (cvs. Celera II-AU and Jade-AU) and Blackgram (cv. Onyx-AU) to Transient Waterlogging

Use of Phenomics for Differentiation of Mungbean (Vigna radiata L. Wilczek) Genotypes Varying in Growth Rates Per Unit of Water

Assessment of root phenotypes in mungbean mini-core collection (MMC) from the World Vegetable Center (AVRDC) Taiwan

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