Increasing Grain Yield of Submergence-Tolerant Rice (Oryza Sativa L.) Through Appropriate Nutrient Management

Htwe, Than

doi:10.15666/aeer/1706_1564315655

Cited by 2 publications

(1 citation statement)

References 26 publications

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“…4.1 Submergence stress promotes the formation of a large number of adventitious roots in H. compressa Morphological characteristics of the root system after flooding stress can be a direct response to its growth status. Energy deficiency caused by hypoxia due to the flooded environment leads to a reduction in nutrient uptake by the plant, resulting in a cessation of root elongation, leading to significant root damage and death of the root tip (Htwe et al, 2019). Flooding stress stimulates the growth of adventitious roots, which are an important means of adaptation or resistance to flooding in many plants, and the ability of adventitious root cells to divide and their physiological activity is enhanced under flooding stress, thus maintaining normal physiological activities of transportation and oxygen acquisition (Wei and Li, 2000).…”

Section: Discussionmentioning

confidence: 99%

Morphological and molecular response mechanisms of the root system of different Hemarthria compressa species to submergence stress

Shen,

Li,

Zheng

et al. 2024

Front. Plant Sci.

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IntroductionThe severity of flood disasters is increasing due to climate change, resulting in a significant reduction in the yield and quality of forage crops worldwide. This poses a serious threat to the development of agriculture and livestock. Hemarthria compressa is an important high-quality forage grass in southern China. In recent years, frequent flooding has caused varying degrees of impacts on H. compressa and their ecological environment.MethodsIn this study, we evaluated differences in flooding tolerance between the root systems of the experimental materials GY (Guang Yi, flood-tolerant) and N1291 (N201801291, flood-sensitive). We measured their morphological indexes after 7 d, 14 d, and 21 d of submergence stress and sequenced their transcriptomes at 8 h and 24 h, with 0 h as the control.ResultsDuring submergence stress, the number of adventitious roots and root length of both GY and N1291 tended to increase, but the overall growth of GY was significantly higher than that of N1291. RNA-seq analysis revealed that 6046 and 7493 DEGs were identified in GY-8h and GY-24h, respectively, and 9198 and 4236 DEGs in N1291-8h and N1291-24h, respectively, compared with the control. The GO and KEGG enrichment analysis results indicated the GO terms mainly enriched among the DEGs were oxidation-reduction process, obsolete peroxidase reaction, and other antioxidant-related terms. The KEGG pathways that were most significantly enriched were phenylpropanoid biosynthesis, plant hormone signal transduction etc. The genes of transcription factor families, such as C2H2, bHLH and bZIP, were highly expressed in the H. compressa after submergence, which might be closely related to the submergence adaptive response mechanisms of H. compressa.DiscussionThis study provides basic data for analyzing the molecular and morphological mechanisms of H. compressa in response to submergence stress, and also provides theoretical support for the subsequent improvement of submergence tolerance traits of H. compressa.

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Section: Discussionmentioning

confidence: 99%

Morphological and molecular response mechanisms of the root system of different Hemarthria compressa species to submergence stress

Shen,

Li,

Zheng

et al. 2024

Front. Plant Sci.

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Submergence stress in rice: Adaptive mechanisms, coping strategies and future research needs

Kumar

Nayak

Hanjagi

et al. 2021

Environmental and Experimental Botany

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Increasing Grain Yield of Submergence-Tolerant Rice (Oryza Sativa L.) Through Appropriate Nutrient Management

Abstract: Flooding is one of the environmental stresses that cause a reduction in rice yield and the effect varies between rice varieties. This study aimed to investigate the response of different rice varieties (Hnan

Cited by 2 publications

References 26 publications

Morphological and molecular response mechanisms of the root system of different Hemarthria compressa species to submergence stress

Morphological and molecular response mechanisms of the root system of different Hemarthria compressa species to submergence stress

Submergence stress in rice: Adaptive mechanisms, coping strategies and future research needs

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