Post‐anthesis saline‐alkali stress inhibits grain filling by promoting ethylene production and signal transduction

Peng, Yaqiong; Chen, Yinke; Yang, Yuan; Liu, Bohan; Yu, Peng; Song, Shenhua; Yi, Yake; Teng, Zhonghua; Yi, Zhenxie; Zhang, Jianhua; Meng, Shuan; Ye, Nenghui; Duan, Meijuan

doi:10.1002/fes3.384

Cited by 11 publications

(8 citation statements)

References 69 publications

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“…Ethylene (Eth) was the first identified gaseous plant hormone, which has been reported as a positive regulator for salt and saline-alkali tolerance [129]. However, a recent study in rice showed that during the period of post-anthesis, saline-alkali stress induces the biosynthesis of Eth, which has a negative effect on grain filling [130], suggesting a diverse roles in plant response to saline-alkali stress during different development stages. Studies in Arabidopsis showed that under saline-alkali stress, Eth increased the transcript level of AUX1 and auxin biosynthesis-related genes, promoted auxin accumulation, and relieved the inhibition of root elongation under saline-alkali stress [131].…”

Section: Plant Hormones Mediate Saline-alkali Tolerancementioning

confidence: 99%

“…For example, ZmNSA1 negatively regulates the activity of PM H + -ATPase and SOS1, functions as a negative regulator of maize saline-alkali tolerance [58]. In rice, the ethylene biosynthesis-related genes, OsACS and OsACO, also play negative roles in response to saline-alkali stress during the period of post-anthesis [130]. PsnWRKY70 negatively regulate saline-alkali tolerance by affecting the cell wall organization or biogenesis-related gene expression in Poplar [174].…”

Section: Crispr/cas9-based Genome Editing Technologymentioning

confidence: 99%

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New Insight into Plant Saline-Alkali Tolerance Mechanisms and Application to Breeding

Cao

Song

Zhang

2022

IJMS

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Saline-alkali stress is a widespread adversity that severely affects plant growth and productivity. Saline-alkaline soils are characterized by high salt content and high pH values, which simultaneously cause combined damage from osmotic stress, ionic toxicity, high pH and HCO3−/CO32− stress. In recent years, many determinants of salt tolerance have been identified and their regulatory mechanisms are fairly well understood. However, the mechanism by which plants respond to comprehensive saline-alkali stress remains largely unknown. This review summarizes recent advances in the physiological, biochemical and molecular mechanisms of plants tolerance to salinity or salt- alkali stress. Focused on the progress made in elucidating the regulation mechanisms adopted by plants in response to saline-alkali stress and present some new views on the understanding of plants in the face of comprehensive stress. Plants generally promote saline-alkali tolerance by maintaining pH and Na+ homeostasis, while the plants responding to HCO3−/CO32− stress are not exactly the same as high pH stress. We proposed that pH-tolerant or sensitive plants have evolved distinct mechanisms to adapt to saline-alkaline stress. Finally, we highlight the areas that require further research to reveal the new components of saline-alkali tolerance in plants and present the current and potential application of key determinants in breed improvement and molecular breeding.

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Section: Plant Hormones Mediate Saline-alkali Tolerancementioning

confidence: 99%

Section: Crispr/cas9-based Genome Editing Technologymentioning

confidence: 99%

New Insight into Plant Saline-Alkali Tolerance Mechanisms and Application to Breeding

Cao

Song

Zhang

2022

IJMS

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“…The drought tolerance and susceptible varieties can be determined at the seedling stage by evaluating the seed germination rate under water stress (Kumar et al, 2015). In addition, seed priming is an effective and environmentally friendly strategy to improve seedling tolerance under drought-stress conditions (Liu et al, 2022) (Table 1).…”

Section: Effects Of Drought On Germination and Morphological Traitsmentioning

confidence: 99%

“…The process of grain filling is controlled mainly by four key enzymes: adenosine diphosphate-glucose-pyrophosphorylase, starch synthase, starch branching enzyme, and sucrose synthase. Disruption in the activities of these key enzymes during stress events will lead to a severe decline in grain yield (Peng et al, 2022) because starch accounts for 60 -80% of cereals' grain weight (Lv et al, 2021). This implies that any changes in the environment dynamic directly affects the grain filling.…”

Section: Effects Of Drought On Yield and Yield Componentsmentioning

confidence: 99%

Drought Impacts and the Tolerance Mechanisms in Rice (Oryza sativa L.): A Review

Oyebamiji

Shamsudin²,

Ikmal³

et al. 2022

Egypt. J. Agron.

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Egyptian Journal of Agronomy http://agro.journals.ekb.eg/ Review 9 R ICE (Oryza sativa L.) is considered the major source of calories for more than half of the world's population. However, this Asian staple crop is susceptible to abiotic stress, including drought, throughout its life cycle. The main theme covered in this review includes types of drought and its effects on rice morphological, physiological, biochemical, and agronomical levels and their adaptive mechanisms under drought. Drought in the rainfed ecosystem during critical stages (germination and reproductive stages) has seriously undermined rice production, posing a danger to global food supply and sustainable food production worldwide. It caused a reduction in the germination rate, CO 2 assimilation rate, photosynthesis activities, gas exchange via the leaf, plant height, number of panicles, seed weight, biomass, harvest index, and yield. Delayed seed germination, flowering, and maturity of the rice plant are also associated with water stress. Under mild or adverse drought conditions, plants exhibit certain adaptive changes or tolerance mechanisms, including activating antioxidant systems and the production of osmolytes such as proline and polyamine, subsequently enhancing drought tolerance. The role of phytohormones in alleviating stress has been recognized and highlighted in this review. Furthermore, the plant root system also plays a significant role in drought. The information provided in this review will help researchers to have comprehensive knowledge and understanding of the changes and disruptions that occur in rice during water stress and its tolerance mechanisms, subsequently facilitating the selection and development of droughttolerant rice.

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“…Numerous sources have shown that the manipulation of the starch biosynthesis pathway by modern molecular genetic techniques will alter the grain filling. It is also well demonstrated that grain filling is sensitive to different environmental cues [ 13 , 14 ], of which MD treatment has been proven to be a highly effective means of increasing inferior grain filling and grain yield by improving the key enzymes in sucrose-to-starch conversion [ 5 , 6 , 15 ]. The enzyme activities, especially sucrose synthase (SUS) and AGP in the inferior spikelets, are significantly enhanced by MD treatment, resulting in am improved inferior grain filling rate, grain weight, and yield [ 7 , 16 ].…”

Section: Introductionmentioning

confidence: 99%

Moderate Soil Drying-Induced Alternative Splicing Provides a Potential Novel Approach for the Regulation of Grain Filling in Rice Inferior Spikelets

Teng

Zheng

Liu

et al. 2022

IJMS

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Poor grain filling of inferior spikelets, especially in some large-panicle rice varieties, is becoming a major limitation in breaking the ceiling of rice production. In our previous studies, we proved that post-anthesis moderate soil drying (MD) was an effective way to promote starch synthesis and inferior grain filling. As one of the most important regulatory processes in response to environmental cues and at different developmental stages, the function of alternative splicing (AS) has not yet been revealed in regulating grain filling under MD conditions. In this study, AS events at the most active grain-filling stage were identified in inferior spikelets under well-watered control (CK) and MD treatments. Of 16,089 AS events, 1840 AS events involving 1392 genes occurred differentially between the CK and MD treatments, many of which function on spliceosome, ncRNA metabolic process, starch, and sucrose metabolism, and other functions. Some of the splicing factors and starch synthesis-related genes, such as SR protein, hnRNP protein, OsAGPL2, OsAPS2, OsSSIVa, OsSSIVb, OsGBSSII, and OsISA1 showed differential AS changes under MD treatment. The expression of miR439f and miR444b was reduced due to an AS event which occurred in the intron where miRNAs were located in the MD-treated inferior spikelets. On the contrary, OsAGPL2, an AGPase encoding gene, was alternatively spliced, resulting in different transcripts with or without the miR393b binding site, suggesting a potential mechanism for miRNA-mediated gene regulation on grain filling of inferior spikelets in response to MD treatment. This study provides some new insights into the function of AS on the MD-promoted grain filling of inferior spikelets, and potential application in agriculture to increase rice yields by genetic approaches.

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Post‐anthesis saline‐alkali stress inhibits grain filling by promoting ethylene production and signal transduction

Cited by 11 publications

References 69 publications

New Insight into Plant Saline-Alkali Tolerance Mechanisms and Application to Breeding

New Insight into Plant Saline-Alkali Tolerance Mechanisms and Application to Breeding

Drought Impacts and the Tolerance Mechanisms in Rice (Oryza sativa L.): A Review

Moderate Soil Drying-Induced Alternative Splicing Provides a Potential Novel Approach for the Regulation of Grain Filling in Rice Inferior Spikelets

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