Effects of Alternate Wetting and Drying Irrigation during Grain Filling on the Seed-Setting Rate and Grain Weight of Two Super Rice Cultivars

Fu, Jing; Liu, Jie; Cao, Zhuanqin; Wang, Zhiqin; Zhang, Hao

doi:10.3724/sp.j.1006.2014.01056

Cited by 8 publications

(4 citation statements)

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“…Usually, drought could induce the expression of proteins involved in ROS production . However, we observed that the WMD treatment significantly up‐regulated the proteins involved in the antioxidation system, DHAR, APX2, Mn‐SOD and 1‐Cys Prx A, in inferior spikelets (Tables and , Fig.…”

Section: Discussionmentioning

confidence: 75%

Expression of proteins in superior and inferior spikelets of rice during grain filling under different irrigation regimes

Chen

Wang

et al. 2015

Proteomics

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Poor grain filling of later-flowering inferior spikelets is a serious problem in modern rice cultivars, but the reason and regulation remain unclear. This study investigated post-anthesis protein expression in relation with grain filling and the possibility to use irrigation methods to enhance grain filling through regulating protein expression. One japonica rice cultivar was field-grown under three irrigation treatments imposed during the grain filling period: alternate wetting and moderate soil-drying (WMD), alternate wetting and severe soil-drying (WSD), and conventional irrigation. High resolution 2DE, combined with MALDI/TOF, was used to compare differential protein expression between superior and inferior spikelets. Results showed that the expression of proteins that function in photosynthesis, carbohydrate and energy metabolism, amino acids metabolism and defense responses were largely down-regulated in inferior spikelets compared to those in superior spikelets. The WMD treatment enhanced grain filling rate and the expression of these proteins, whereas the WSD treatment decreased them. Similar results were observed for transcript levels of the genes encoding these proteins. These results suggest that down-regulated expression of the proteins associated with grain filling contribute to the poor grain filling of inferior spikelets, and post-anthesis WMD could improve grain filling through regulating protein expression in the spikelets.

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Section: Discussionmentioning

confidence: 75%

Expression of proteins in superior and inferior spikelets of rice during grain filling under different irrigation regimes

Chen

Wang

et al. 2015

Proteomics

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“…Pods and their subtending leaves exhibit a “source‐sink” relationship (Fu et al, 1999; Gent, 1982). Heat stressed plants with adequate quantities of water supplied, and the increased Gs allowed for effective transpirational cooling (Bramley et al, 2013; Rizhsky et al, 2004) and carbon fixation (Messinger & Mott, 2006) in the subtending leaves, resulting in a slight effect on Pn under short‐term heat stress and ensuring rapid subsequent recovery of PSII capacity after short‐term exposure to high temperature.…”

Section: Discussionmentioning

confidence: 99%

“…Soybean, an economically important crop species, is a good source of oil, protein, macronutrients, and minerals (Foyer et al, 2016). Pod development is closely associated with subtending leaves, and the photosynthates used for the soybean pods filling are mainly supplied by the photosynthesis of subtending leaves at the same node (Fu et al, 1999; Gent, 1982). Chlorophyll, an indicator for leaves photosynthesis, is indispensable for the conversion of absorbed light energy into stored chemical energy (Šabajevienė et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

Photosynthetic characteristics of subtending leaves and their relationships with soybean pod development under heat, drought and combined stresses

Zhang

Wei

et al. 2022

J Agronomy Crop Science

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Soybean is usually grown under rain‐fed conditions, and long‐term drought stress often occurs with short‐term heat stress. This study aimed to investigate changes in the photosynthetic characteristics of subtending leaves and their relationships with pod development under short‐term heat, long‐term drought and their combined stresses. Short‐term heat stress lasted for 5 days began at R5 stage, and long‐term drought stress lasted from R5 stage until maturity, respectively. No significant effect was observed on pod development under short‐term heat stress alone due to unaffected net photosynthetic rate after treatment and PSII recovery after the heat stress release. Except that the reduction of sucrose content had been brought forward from 12 to 5 days after treatment under combined stresses, application of combined stresses caused similar responses to long‐term drought stress alone on the photosynthetic characteristics of subtending leaves and pod development, but more pronounced under combined stresses. Reduced pod weight and seed weight per pod under long‐term drought stress alone or combined stress due to a decrease in the net photosynthetic rate and production of sucrose and starch, especially after 19 days of treatment. Findings from this study demonstrate that under combined stress, long‐term drought stress had a dominant effect on the photosynthetic performance of subtending leaves and pod development over short‐term heat stress; moreover, even short‐term heat stress also exacerbates the negative effects of long‐term drought stress.

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“…Seed setting rate is affected by several factors, including biomass-spikelet ratio, spikelet-to-leaf ratio, specific leaf weight, spikelet-sheath quantity, and spikelet differentiation (Zhou et al, 2011; Toh et al, 2012; Li et al, 2013; Xu et al, 2017; Liu et al, 2018; He et al, 2019; Liu et al, 2019; Xu et al, 2019; Xiang et al, 2019). Moreover, seed setting rate is also easily affected by the external environment, such as drought, high temperature, low temperature, or saline-alkali stress (Xu et al, 2014; Fu et al, 2014; Wang et al, 2016b; Ma et al, 2018; Cheabu et al, 2018; Si et al, 2018). Further study of seed setting rate has important significance both for its mechanism and for the improvement of rice yield.…”

Section: Introductionmentioning

confidence: 99%

ESD1 Affects Seed Setting Rate in Rice by Controlling Embryo Sac Development

Wang

Song

et al. 2021

Preprint

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Seed setting rate is one of the critical factors that determine rice yield. Grain formation is a complex biological process, whose molecular mechanism is yet to be improved. Here we investigated the function of an OVATE family protein, Embryo Sac Development 1 (ESD1), in the regulation of seed setting rate in rice (Oryza sativa) by examining its loss-of-function mutants generated via CRISPR/Cas9 technology. ESD1 was predominantly expressed at stage 6 of panicle development, especially in the ovules. esd1 mutants displayed reduced seed setting rates with normal stamen development and pollen tube growth but abnormal pistil group. Investigation of embryo sacs revealed that during the mitosis of functional megaspores, some egg cells degraded during differentiation in esd1 mutants, thereby hindering subsequent fertilization process and reducing seed setting rate. In addition, the transcriptional level of OsAPC6, a reported embryo sac developing gene, was found to be significantly reduced in esd1 mutants. These results support that ESD1 is an important modulator of embryo sac development and seed setting rate in rice. Together, this finding demonstrates that ESD1 positively regulates the seed setting rate by controlling embryo sac development in rice, and has implications for the improvement of rice yield.

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Effects of Alternate Wetting and Drying Irrigation during Grain Filling on the Seed-Setting Rate and Grain Weight of Two Super Rice Cultivars

Cited by 8 publications

References 0 publications

Expression of proteins in superior and inferior spikelets of rice during grain filling under different irrigation regimes

Expression of proteins in superior and inferior spikelets of rice during grain filling under different irrigation regimes

Photosynthetic characteristics of subtending leaves and their relationships with soybean pod development under heat, drought and combined stresses

ESD1 Affects Seed Setting Rate in Rice by Controlling Embryo Sac Development

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