Impacts of chilling at the tillering phases on rice growth and grain yield in Northeast China

Guo, Erjing; Wang, Lizhi; Jiang, Shukun; Xiang, Hao; Shi, Yuanhao; Chen, Xi; Cheng, Xue; Wang, Xiaoyu; Zhang, Tianyi; Wang, Lianmin; Feng, Yanjiang; Lai, Yongcai; Li, Tao; Yang, Xiaoguang

doi:10.1111/jac.12596

Cited by 4 publications

(3 citation statements)

References 39 publications

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“…Exposure to cold stress during the seedling, flowering, and grain-filling stages in rice was found to weaken the efficiency of light utilization in the leaves at these stages, lower the photosynthetic rate in rice leaves, inhibit the synthesis and transport of assimilates, affect the growth rate of rice, and cause an increase in the source/sink growth ratio, leading to a reduction in rice production [4]. Similar results were also found in other studies of rice subjected to cold stress at different growth stages [5,6]. The occurrence of late spring coldness during the rice seedling stage severely affects the safe production of rice.…”

Section: Introductionsupporting

confidence: 84%

Transcriptome and Metabolome Analyses Reveal Ascorbic Acid Ameliorates Cold Tolerance in Rice Seedling Plants

Wang,

Lu,

Yan

et al. 2024

Agronomy

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Ascorbic acid (AsA) plays a crucial role in the physiological processes of rice plants when they encounter various biotic and abiotic stresses. However, the specific mechanism by which AsA affects cold tolerance in rice seedlings remains unclear. Two rice genotypes, Zhongzao39 (ZZ39) and its recombinant inbred line RIL82, were exposed to cold stress, resulting in more damage observed in RIL82 compared to ZZ39. This damage included higher levels of relative electrolytic leakage (REC), malondialdehyde (MDA), H2O2, a lower Fv/Fm, and a lower survival rate. A comprehensive analysis of transcriptome and metabolome data indicated that AsA was involved in regulating cold tolerance in ZZ39 and RIL82 seedling plants. AsA content increased in ZZ39 while it decreased in RIL82 under cold stress. Additionally, analysis of carbohydrate contents highlighted their important role in the responses to cold stress of these two genotypes. Importantly, exogenous AsA and sucrose, either alone or in combination, enhanced the values of maximum fluorescence quantum yield (Fv/Fm) and effective quantum yield (YII) as well as decreased H2O2 and MDA levels to improve cold tolerance in both genotypes compared with plants treated with H2O. These findings highlight the potential significance of AsA in mitigating the effects of cold stress on rice seedling plants.

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Section: Introductionsupporting

confidence: 84%

Transcriptome and Metabolome Analyses Reveal Ascorbic Acid Ameliorates Cold Tolerance in Rice Seedling Plants

Wang,

Lu,

Yan

et al. 2024

Agronomy

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“…The shortened reproductive growth stage will affect the formation of spikelets. Coupled with the reduced accumulation of nutrients in the early stage, and the weak single stem at the heading stage, this will aggravate the degradation of spikelets, which is not conducive to the accumulation of substances in the panicle ( Guo et al., 2022 ).…”

Section: Discussionmentioning

confidence: 99%

Difference in Cd accumulation among varieties with different growth duration corresponding to typical agro-climate condition in rice ratooning system

Yuan,

Jiang,

Chen

et al. 2024

Front. Plant Sci.

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IntroductionThe ratoon rice planting area is gradually expanding, but there has been relatively little research on ratoon rice grains contaminated with Cd.MethodsIn this study, five ratoon rice varieties were selected and divided into three groups according to early-maturity (growth duration: 100–110 days), mid-maturity (growth duration: 110–120 days) and late-maturity (growth duration: 120–130 days) varieties. Field experiments were done to study the differences in Cd accumulation among ratoon rice varieties with different growth duration.ResultsThe results showed that the Cd accumulation and concentration of grains spikelet at each growth stage in the main crop were in the order of late-maturity > mid-maturity > early-maturity varieties. However, the trends in Cd concentration and accumulation in grains spikelet during the ratoon crop were the opposite. Analysis found that as the growth duration of the variety extended, the accumulated temperature and daily average temperature in the main crop increased, which significantly increased the translocation factors of Cd from root, stem, and leaf to grains spikelet, and increased the daily average Cd accumulation rate in grains spikelet. The daily average temperature in the ratoon crop increased as the growth duration shortened. The early-maturity variety had higher Cd accumulation in stubble, which promoted the translocation of Cd from the root, stem, and leaf of the plant to the grains spikelet.DiscussionTherefore, appropriately shortening the growth duration of the main crop and extending the growth duration of the ratoon crop are important ways to reduce Cd accumulation in ratoon rice in areas with mild Cd pollution.

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“…Once the rice plants in the pots reached the targeted tillering (25 days after transplanting), booting (the upmost pulvinus interval of main stems are −5~−7 cm) and flowering (the main stems bloom up to 10%) stages, they were transferred into naturally lit growth chambers (4 m long, 4 m wide and 3.5 m high) for artificial chilling treatment (Figure 1a). Based on previous research (Guo et al, 2022; Shi, Guo, Wang, et al, 2022) and historical meteorological data (Figure S1), we selected the average temperature of 12°C (extreme chilling temperature level) and 18°C (chilling temperature level that may be encountered in actual production) as the treatment temperature and the intermittent days were set to 2 days, the diurnal temperature was 10°C (Figure S2). There were four chilling durations of D2, D4, D6 and D8 for the continuous and intermittent chilling treatments.…”

Section: Methodsmentioning

confidence: 99%

An experimental study on the effects of intermittent chilling at different growth stages on rice yield in Northeast China

Shi

Wang²,

Jiang³

et al. 2023

J Agronomy Crop Science

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In Northeast China, the frequency and intensity of chilling events has been increasing continuously, which places regional rice production at an increasing risk for yield loss.Previous studies have shown that continuous chilling at the tillering, booting and flowering stages could reduce rice grain yield. However, the effects of intermittent chilling at different growth stages on rice yield have rarely been reported. In this study, we conducted a temperature-controlled experiment on rice plants at the tillering, booting and flowering stages, with both continuous and intermittent chilling treatments at two chilling temperatures and four chilling durations. The results showed that rice grain yield was most affected by chilling at the booting stage, followed by chilling at the flowering stage and least affected by chilling at the tillering stage. For per 1 day increase in chilling duration, the continuous (intermittent) chilling treatment at T1 (11°C/12°C/12°C) at the tillering, booting and flowering stages decreased the grain yield per plant by 1.0%, 6.0% and 2.9% (0.9%, 2.7% and 1.6%), respectively. For per 10°C•day increase in cooling degree days, the continuous (intermittent) chilling treatment at the booting stage decreased the grain yield per plant, spikelet fertility, grain number per spike and thousand grain weight by 10.7%, 7.9%, 5.4% and 1.6% (5.6%, 1.5%, 4.4% and 1.2%), respectively. While the continuous (intermittent) chilling treatment at the flowering stage decreased the grain yield per plant and spikelet fertility by 4.9% and 3.9% (2.8% and 3.2%), respectively. Our study is complementary to the current knowledge gap concerning the mechanism of chilling-induced yield losses for rice. In particular, the results of this study could be used to (a) modify the chilling effects algorithms in rice models to improve the simulation accuracy in rice yields and (b) target the genetic features to breed new rice varieties with greater cold tolerance.

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Impacts of chilling at the tillering phases on rice growth and grain yield in Northeast China

Cited by 4 publications

References 39 publications

Transcriptome and Metabolome Analyses Reveal Ascorbic Acid Ameliorates Cold Tolerance in Rice Seedling Plants

Transcriptome and Metabolome Analyses Reveal Ascorbic Acid Ameliorates Cold Tolerance in Rice Seedling Plants

Difference in Cd accumulation among varieties with different growth duration corresponding to typical agro-climate condition in rice ratooning system

An experimental study on the effects of intermittent chilling at different growth stages on rice yield in Northeast China

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