Mechanisms associated with tiller suppression under stagnant flooding in rice

Zhu, Guanglong; Chen, Yutiao; Ella, Evangelina S.

doi:10.1111/jac.12316

Cited by 15 publications

(10 citation statements)

References 44 publications

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“…The number of panicles is affected by the number of tillers at the tillering stage (Ao et al, 2010). Previous studies indicate that tiller number will decline sharply during submergence (Kato et al, 2014;Zhu et al, 2019), and in our study, we also found that tiller number decreased greatly in the submergence treatment than compared to that in the control. Accordingly, the lower tiller numbers led to reduced panicle number at the maturity stage (Figure 1).…”

Section: Discussionsupporting

confidence: 75%

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Effects of submergence stress at the vegetative growth stage on hybrid rice growth and grain yield in China

Chen¹,

Song²,

Yan³

et al. 2021

Chil. j. agric. res.

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Submergence stress can greatly limit grain yield of inbred rice (Oryza sativa L.), but the effects of submergence on hybrid rice are unclear. A pot experiment was conducted to clarify the effects of submergence that happens at the vegetative growth stage on two Chinese hybrid rice cultivars. The rice cultivars Zheyou-18, an indica-japonica hybrid, and Yliangyou-689, an indica hybrid, were planted under two treatments, submergence (43 cm depth of tap water for about 2 wk) and control (no submergence). Results showed that the grain yield of submerged 'Yliangyou-689' was 539.0 g m -2 in 2018 and 614.2 g m -2 in 2019; submergence significantly reduced grain yield by 49.6% and 44.2% of that of the control. The lower level of grain yield was attributed to reduced survival rate, numbers of tillers and spikelets, plant dry weight, and crop growth rate, and excessive elongation of stems due to submergence of plants. The grain yield of submerged 'Zheyou-18' was 466.8 g m -2 in 2018 and 376.4 g m -2 in 2019 and neither of which were significantly different from that of the control, indicating higher submergence tolerance in 'Zheyou-18' than in 'Yliangyou-689'. Submergence did not affect plant N and K contents, but it reduced plant N uptake rates by 47.8% to 88.7% and it reduced K uptake rates by 53.9% to 89.5% of that of the control in these two hybrid cultivars. Furthermore, nonsignificant differences were observed in all of the parameters related to rice starch viscosity between control and submergence treatment.

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Section: Discussionsupporting

confidence: 75%

“…Numerous studies have indicated that leaf photosynthetic rates of submerged inbred rice will be reduced because light intensity and gas diffusion rates rapidly decline under water (Gautam et al, 2015;Zhu et al, 2019). Consequently, contents of non-structural carbohydrates (NSC) in rice stems and biomass accumulation are reduced.…”

Section: Discussionmentioning

confidence: 99%

Effects of submergence stress at the vegetative growth stage on hybrid rice growth and grain yield in China

Chen¹,

Song²,

Yan³

et al. 2021

Chil. j. agric. res.

Self Cite

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“…Foliar MDA concentration was recorded to evaluate oxidative damage in relation to lipid peroxidation accumulation as a response to salinity and inundation stress ( De Azevedo Neto et al . 2006 ; Zhu et al ., 2019 ). MDA was assayed following Buege and Aust (1978 ).…”

Section: Methodsmentioning

confidence: 99%

From physiology to salt marsh management challenges with sea level rise: the case of native Spartina foliosa, invasive S. densiflora and their hybrid

Gallego‐Tévar

Peinado-Torrubia

Álvarez

et al. 2020

Conservation Physiology

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Abstract Sea level rise (SLR) imposes increasing salinity and inundation stresses in salt marshes which simultaneously face invasions by exotic plant species. We aimed to improve and apply knowledge on the ecophysiological responses of halophytes to SLR to conservation management of salt marshes. In a mesocosm experiment, we measured and compared phosphoenolpyruvate carboxylase (PEPC) activity and related functional traits of the California-native Spartina foliosa, invasive S. densiflora and their hybrid S. densiflora × foliosa in response to increasing levels of salinity and inundation. S. foliosa was moderately sensitive to salinity, showing a 57% reduction in PEPC specific activity from freshwater to hypersalinity. This native species compensated for the reduction of PEPC activity with increased salinity through 80% higher enzyme activation by phosphorylation. PEPC functional trait responses of S. foliosa were mostly independent of inundation depth. In view of these results, managers should conserve undeveloped lands for accommodation space above current high tide lines to facilitate colonization of stress-tolerant S. foliosa. Our results on functional responses of PEPC traits recorded high sensitivity to salinity for S. densiflora. This was reflected by 65% lower PEPC specific activity together with increasing accumulation of free proline (+96%) and total proteins (+23%) with elevated salinity. These results suggest prioritized eradication of S. densiflora populations in brackish habitats. Measured PEPC responses support the high stress tolerance of the S. densiflora × foliosa hybrid. PEPC traits for the hybrid were mostly independent of salinity and inundation. The hybrid showed higher PEPC-specific activity than S. foliosa (+70%) and S. densiflora (+15%) in freshwater under intermediate inundation. Results suggest that eradication of the hybrid should be the highest management priority. Our study shows that the responses of key functional physiological traits to environmental stresses serve as biological indicators that can guide ecosystem management practices in a scenario of climate change.

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“…The experiments were repeated at least three times. The plant elongation rates were calculated using the technique of Zhu et al [28]. The plant elongation rate denotes the difference in the length of the plant's above-ground part before and after treatment.…”

Section: Seedlings Plant High Fresh Weight Dry Weight Chlorophyll Cmentioning

confidence: 99%

The Seedlings of Different Japonica Rice Varieties Exhibit Differ Physiological Properties to Modulate Plant Survival Rates under Submergence Stress

Yang

2020

Plants

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Oryza sativa is a major food crop in Asia. In recent years, typhoons and sudden downpours have caused field flooding, which has resulted in serious harm to the production of rice. In this study, our data revealed that the plant heights of the five Japonica varieties increased during submergence. The elongation rates of TN14, KH139, and TK9 increased significantly during submergence. Chlorophyll contents of the five varieties significantly decreased after submergence and increased after recovery. Moreover, the chlorophyll content of KH139 was significantly higher than those of the other four varieties after recovery. The plant survival rates of the five varieties were higher than 50% after four-day submergence. After eight-day submergence, the survival rate of KH139 remained at 90%, which was the highest among the different varieties. The KH139 presented lower accumulation of hydrogen peroxide and the catalase activity than those of the other four varieties under submergence. The sucrose synthase 1 and alcohol dehydrogenase 1 were induced in KH139 under submergence. The results presented that different varieties of japonica rice have different flood tolerances, especially KH139 under submergence was superior to that of the other four varieties. These results can provide crucial information for future research on japonica rice under flooding stress.

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Mechanisms associated with tiller suppression under stagnant flooding in rice

Cited by 15 publications

References 44 publications

Effects of submergence stress at the vegetative growth stage on hybrid rice growth and grain yield in China

Effects of submergence stress at the vegetative growth stage on hybrid rice growth and grain yield in China

From physiology to salt marsh management challenges with sea level rise: the case of native Spartina foliosa, invasive S. densiflora and their hybrid

The Seedlings of Different Japonica Rice Varieties Exhibit Differ Physiological Properties to Modulate Plant Survival Rates under Submergence Stress

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