Screening of Rice Accessions for Tolerance to Drought and Salt Stress Using Morphological and Physiological Parameters

Umego, C.M.; Ntui, Valentine Otang; Ita, Effiom Eyo; Charles, Opara; Uyoh, Edak Aniedi

doi:10.4236/ajps.2020.1112147

Cited by 6 publications

(3 citation statements)

References 45 publications

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“…These effects often manifest as plant death or deterioration on plant growth, increased respiration rates and decreased photosynthesis efficiency [7]. Decrease in photosynthesis rates results in reduced plant growth, including root growth, which leads to a reduction in yield [8].…”

Section: Introductionmentioning

confidence: 99%

Distinct Morpho-Physiological Responses of Maize to Salinity Stress

Dikobe¹,

Mashile²,

Sinthumule³

et al. 2021

AJPS

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Most plants demonstrate wide interactive and complex adaptive morphological, biochemical, and physiological responses when subjected to salinity stress. Salt stress negatively impacts agricultural yields more especially cultivated crops throughout the world. Of interest to this study is maize a saltsensitive crop that is widely grown worldwide, and receiving most attention due to its significant attributes and ability to serve as a great model for stress response studies. We exposed QN701 maize cultivar, to simulated salinity stress and investigated its morphological and physiological responses. Salinity negatively induced various morphological responses such as the reduction in plant height, number of leaves, shoot and root (length and biomass), and leaf width; however, it significantly increased the leaf area. On the physiological aspect, salt stress decreased the number of stomata, stomatal density, and photosynthesis, while it increased the respiration rate. This study expanded our knowledge of the morphological and physiological responses of maize to salinity stress. Additionally, these findings may serve as a recommendation for salinity breeding programs in maize and related cereal crops.

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Section: Introductionmentioning

confidence: 99%

Distinct Morpho-Physiological Responses of Maize to Salinity Stress

Dikobe¹,

Mashile²,

Sinthumule³

et al. 2021

AJPS

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“…Seven distinct cluster were formed in which cluster I showed more drought tolerance such as Chenkayama, Kuliyadican, Rajalakshmi, Chandaikar, Oheruchitteni, AathurKichadi Samba, Arikiraavi and Sahabhagidan with drought tolerant check IR 64 Drt 1. Umegoet al (2020) [33] has evaluated 11 rice genotypes under induced drought conditions using morphological and physiological parameters. Data were taken on plant height, number of tillers, leaf length, number of green leaves, number of dead leaves, leaf rolling score, and rate of water loss.…”

Section: Physiological Traits Associated With Drought Tolerantmentioning

confidence: 99%

Exploration of traditional rice (Oryza sativa L.) land races: Scope for the future sustainable food production

Sivakumar¹,

Chitra²,

Gatta³

et al. 2021

Pharma Innovation

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Traditional landraces have more complex genetic backgrounds, abundant genetic diversity and heterogenecity, as well as strong adaptability to the environment and are the primary source an excellent resistance genes donors for various important pest and diseases. They provide new alleles for the improvement of commercially valuable traits in rice. Global climate change emphasizes the need to use better adapted cultivars of the main crops and traditional landraces as potential donors of useful genes. Traditional rice landraces are pest and disease resistance, and also resistance or tolerance to drought, water logging and flood situation. The traditional rice landraces are being gradually replaced by the incorporation of modern rice cultivars, thereby threatening the existence of many invaluable traits present in such local varieties. A large number of landraces of rice have disappeared from the irrigated field since the adoption of high yielding varieties (HYVs).Existing indigenous traditional rice can play an important role in the development of sustainable agriculture and also valuable for agronomical, social and cultural practices. Conventional breeding techniques are not alone to tap the genetic potential of rice landraces for commercial varietal improvement programme in rice. Molecular breeding programme is highly helpful into the breeders to elucidate the novel genes and QTLs from traditional rice landraces. These genes and QTLS will be introgressed into commercial rice verities through marker aided selection and using other biotechnological tools. This paper reviews the research findings related to improvement in yield, biotic and abiotic stress tolerance in traditional rice landraces.

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“…Its deficiency in soil affects about 50% of rice-cultivated areas worldwide (Pariasca-Tanaka et al, 2014). Together with drought and salinity, they constitute the major abiotic stresses confronting rice production in the growing areas (GRiSP, 2013;Uyoh et al, 2019;Umego et al, 2020). Phosphorus is usually added to the soil in the form of fertilizer for enhanced yield.…”

Section: Introductionmentioning

confidence: 99%