Advances and Challenges in the Breeding of Salt-Tolerant Rice

Qin, Hua; Li, Yuxiang; Huang, Rongfeng

doi:10.3390/ijms21218385

Cited by 125 publications

(92 citation statements)

References 97 publications

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“…However, for plants, the internal defensive system is insufficient to resist salt conditions [ 29 ]. Although breeding salt-tolerant varieties is an effective method to overcome salt environments, salt-tolerant genes may influence multiple phenotypes [ 30 ], which hinders the breeding of salt-tolerant varieties. Therefore, the application of exogenous substances is a promising strategy that improves the salt tolerance of plants [ 31 , 32 ].…”

Section: Introductionmentioning

confidence: 99%

Beneficial Effects of Exogenous Melatonin on Overcoming Salt Stress in Sugar Beets (Beta vulgaris L.)

Zhang

Liu

Wang

et al. 2021

Plants

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Melatonin has been regarded as a promising substance that enhances the abiotic stress tolerance of plants. However, few studies have devoted attention to the role of melatonin in improving salt tolerance in sugar beets. Here, the effects of different application methods (foliar application (100 μM), root application (100 μM), and combined foliar and root application) of melatonin on the morphological and physiological traits of sugar beets exposed to salt stress were investigated. The results showed that melatonin improved the growth of sugar beet seedlings, root yield and sugar content, synthesis of chlorophyll, photosystem II (PS II) activity, and gas exchange parameters under salt stress conditions. Moreover, melatonin enhanced the capacity of osmotic adjustment by increasing the accumulation of osmolytes (betaine, proline, and soluble sugar). At the same time, melatonin increased the H+-pump activities in the roots, thus promoting Na+ efflux and K+ influx, which maintained K+/Na+ homeostasis and mitigated Na+ toxicity. In addition, melatonin strengthened the antioxidant defense system by enhancing the activities of antioxidant enzymes, modulating the ASA-GSH cycle, and mediating the phenylalanine pathway, which removed superoxide anions (O2•−) and hydrogen peroxide (H2O2) and maintained cell membrane integrity. These positive effects were more pronounced when melatonin was applied by combined foliar and root application. To summarize, this study clarifies the potential roles of melatonin in mitigating salt stress in sugar beets by improving photosynthesis, water status, ion homeostasis, and the antioxidant defense system.

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Section: Introductionmentioning

confidence: 99%

Beneficial Effects of Exogenous Melatonin on Overcoming Salt Stress in Sugar Beets (Beta vulgaris L.)

Zhang

Liu

Wang

et al. 2021

Plants

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“…Rice susceptibility to salt is evidenced by a yield decrease due to delays in heading and panicle sterility especially in salt-sensitive varieties like MI48. In contrast, salt tolerance in varieties like IR29, Fatmawati, Pokkali, Cheriviroppu, FL478, IR651, CSR27, FL30, Fontan, SR86, IR9884-54-3 results from ion exclusion, osmotic and tissue tolerance with multiple genes involved in the process, which confers agronomic stability of this trait (Qin et al, 2020;Reddy et al, 2017;Takagi et al, 2015;. The orchestrated stress system can be targeted for achieving salt tolerance by mutating genes encoding key transcription factors, specifically OsRR22 (Os06g0183100), STL1 (Os04g0110600), and the zinc finger transcription factor encoded by DST (Os03g0786400) (Cui et al, 2015;Santosh Kumar et al, 2020;Yuan et al, 2020;.…”

Section: Stress Tolerancementioning

confidence: 99%

Rice breeding in the new era: comparison of useful agronomic traits

Hernández-Soto

Echeverría-Beirute

Abdelnour-Esquivel

et al. 2021

Preprint

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Understanding agronomic traits at a genetic level enables the leveraging of this knowledge to produce crops that are more productive and resilient, have better quality and are adjusted for consumer preferences. In the last decade, rice has become a model to validate the function of specific genes, resulting in valuable but scattered information. Here, we aimed to identify particular genes in rice related to traits that can be targeted by different mutation techniques in the breeding of crops. We selected gain of function, misfunction, and specific mutations associated with phenotypes of agronomic interest. The review includes specific trait-related genes involved in domestication, stress, herbicide tolerance, pathogen resistance, grain number/quality/weight, plant structure, nitrogen use, and others. The information presented can be used for rice, other cereals, and orphan crops to achieve a superior and sustainable production in challenging farming conditions.

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“…Rice susceptibility to salt is evidenced by a yield decrease due to delays in heading and panicle sterility specially in salt-sensitive varieties like MI48. In contrast, salt tolerance varieties like IR29, Fatmawati, Pokkali, Cheriviroppu, FL478, IR651, CSR27, FL30, Fontan, SR86, IR9884-54-3results from ion exclusion, osmotic and tissue tolerance with multiple genes involved in the process, which confers agronomic stability (Takagi et al, 2015;Reddy et al, 2017;Qin et al, 2020). The orchestrated stress system is a perfect target for achieving salt tolerance by knocking out key transcription factors, speci cally OsRR22 (Os06g0183100), STL1 (Os04g0110600), and zinc nger transcription factor DST (Os03g0786400) (Cui et al, 2015;Zhang et al, 2019a;Liu et al, 2020b;Santosh Kumar et al, 2020;Yuan et al, 2020).…”

Section: Stress Tolerancementioning

confidence: 99%

Rice agronomic traits and variability induced by mutagenesis

Hernández-Soto¹,

Echeverría-Beirute²,

Abdelnour-Esquivel³

et al. 2021

Preprint

View full text Add to dashboard Cite

Understanding agronomic traits at a genetic level enables the leveraging of this knowledge to produce crops that are more productive and resilient, have better quality and are adjusted for consumer preferences. In the last decade, rice has become a model to validate the function of specific genes, resulting in valuable but scattered information. Here, we aimed to identify particular genes in rice related to traits that can be targeted by different mutation techniques in the breeding of crops. We selected gain of function, misfunction, and specific mutations associated with phenotypes of agronomic interest. The review includes specific trait-related genes involved in domestication, stress, herbicide tolerance, pathogen resistance, grain number, quality, weight, plant structure, nitrogen use, and others. The information presented can be used for rice and crops with similar or homologous genes to breed crops that require improvement to achieve more sustainable production in challenging farming conditions.

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Advances and Challenges in the Breeding of Salt-Tolerant Rice

Cited by 125 publications

References 97 publications

Beneficial Effects of Exogenous Melatonin on Overcoming Salt Stress in Sugar Beets (Beta vulgaris L.)

Beneficial Effects of Exogenous Melatonin on Overcoming Salt Stress in Sugar Beets (Beta vulgaris L.)

Rice breeding in the new era: comparison of useful agronomic traits

Rice agronomic traits and variability induced by mutagenesis

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