Short-term water management at early filling stage improves early-season rice performance under high temperature stress in South China

Kong, Leilei; Ashraf, Umair; Cheng, Siren; Rao, G. S.; Mo, Zhaowen; Tian, Hua; Pan, Shenggang; Tang, Xiangru

doi:10.1016/j.eja.2017.07.006

Cited by 77 publications

(52 citation statements)

References 47 publications

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“…The study of Huang et al (2015) also revealed that at least 90% organic matter of rice plant was translated and accumulated by CO2 assimilation. Current study agreed with the study of Kong et al (2017) which indicated that the photosynthetic rate at grain-filling stage is one of the important factors affecting the yield of aromatic rice. Our result was also consistent with the study of Lai et al (2019) who indicated that exogenous Se applications could increase the rice yield by regulating the photosynthesis.…”

Section: Discussionsupporting

confidence: 89%

“…During the grain-filling stage (after 15 d of heading stage), portable photosynthesis system (LI-6400, LI-COR, USA) was used to determine net photosynthetic rate (PN), stomatal conductance (gs), intercellular CO2 concentration (Ci), transpiration rate (E), and water-use efficiency (WUE) at 09:00-10:30 h according to Kong et al (2017) with the following adjustments: PAR at leaf surface was 1,100 and 1,200 μmol(photon) m -2 s -1 , ambient CO2 concentration was 385 and 400 μmol mol -1 , air temperature was 31.5 ± 0.5°C with 60-80% relative air humidity. SPAD meter SPAD-502 (Konica Minolta, Japan) was used for precise, rapid, and nondestructive estimation of leaf chlorophyll (Chl) content.…”

Section: Photosynthetic Parametersmentioning

confidence: 99%

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Foliar application of selenium (Se) at heading stage induces regulation of photosynthesis, yield formation, and quality characteristics in fragrant rice

Luo¹,

He²,

Du³

et al. 2019

Photosynt.

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In order to study the effect of foliar application of sodium selenate on fragrant rice performance at the heading stage, the present study was conducted with two fragrant rice cultivars, 'Meixiangzhan-2' and 'Xiangyaxiangzhan'. At the heading stage, six concentrations of sodium selenate solution (0, 10, 20, 30, 40, and 50 μmol L-1) were sprinkled to plants. Our results showed that foliar application of sodium selenate increased chlorophyll contents in rice leaves and upregulated net photosynthetic rate at the grain-filling stage. The enhancement was observed in grain yield, seed-setting rate, and in 1,000-grain mass. The highest yield and net photosynthetic rate were both recorded at 40 μmol L-1 treatment for both cultivars. Furthermore, foliar application of sodium selenate also improved some grain quality attributes, such as head rice rate and crude protein content. The Se concentration in fragrant rice grain also increased due to sodium selenate application. In conclusion, sodium selenate has potential to be the exogenous plant growth regulator in fragrant rice production to increase yield and quality.

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Section: Discussionsupporting

confidence: 89%

Section: Photosynthetic Parametersmentioning

confidence: 99%

Foliar application of selenium (Se) at heading stage induces regulation of photosynthesis, yield formation, and quality characteristics in fragrant rice

Luo¹,

He²,

Du³

et al. 2019

Photosynt.

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“…The other was the proline is one of the osmotic substances in plant in defending the abiotic stress [16][17][18] and exogenous proline application might help to improve fragrant rice stress resistance to the potential stress from the farmland microclimate. Kong et al 14 demonstrated that environmental stress during the grain filling phase would increase chalkiness in rice grain. In order to investigate the effect of exogenous proline on rice chalkiness formation, more studies should be done to at physiological and molecular level.…”

Section: Discussionmentioning

confidence: 99%

“…As one of the non-essential amino acids in the human body, proline is not only one of the components of plant protein, but also one of the osmotic regulators in plant cytoplasm 13 . Previous studies revealed that proline plays important roles in stabilizing the structure of biomacromolecules, reducing the acidity of cells, detoxifying ammonia and regulating the redox potential of cells 14,15 . However, the effect of exogenous proline on fragrant rice performances especially 2-AP biosynthesis were rarely reported.…”

mentioning

confidence: 99%

Exogenous proline induces regulation in 2-acetyl-1-pyrroline (2-AP) biosynthesis and quality characters in fragrant rice (Oryza sativa L.)

Luo

Zhang

Zheng

et al. 2020

Sci Rep

Self Cite

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Proline is one of the precursors of the biosynthesis of 2-acetyl-1-pyrroline (2-AP) which is the key and characteristic volatile component of fragrant rice aroma. In order to study the effects of exogenous proline on 2-AP biosynthesis and other grain quality attributes in fragrant rice, two indica fragrant rice cultivars, "Meixiangzhan-2" and "Xiangyaxiangzhan", and one japonica fragrant rice, "Yunjingyou", were used in present study. At initial heading stage, proline solutions at 0 (CK), 0.10 (Pro1), 0.20 (Pro2) and 0.50 (Pro3) g L-1 were applied as foliar spray solution to fragrant rice plants. Compared with CK, Pro1, Pro2 and Pro3 treatments significantly increased the grain 2-AP content. The significant up-regulation effects due to proline treatments were observed in the contents of proline, △1-pyrrolidine-5-carboxylic acid (P5C) and △1-pyrroline which involved in 2-AP formation. Exogenous proline application also significantly decreased the grain γ-aminobutyric acid (GABA) content. Furthermore, proline treatments enhanced the activity of proline dehydrogenase (ProDH) as well as transcript level of gene PRODH. On the other hand, the transcript level of gene BADH2 and activity of betaine aldehyde dehydrogenase (BADH) decreased under proline treatments. Proline treatments (Pro2 and Pro3) also increased the grain protein content by 3.57-6.51%. Moreover, 32.03-34.25% lower chalky rice rate and 30.80-48.88% lower chalkiness were recorded in proline treatments (Pro2 and Pro3) for both Meixiangzhan and Xiangyaxiangzhan whilst for Yunjingyou, foliar application of proline had no significant effect on chalky rice rate and chalkiness. There was no remarkable difference observed in grain milled quality (brown rice rate, milled rice rate and head rice rate) and amylose content between CK and proline treatments. In conclusion, exogenous proline enhanced the 2-AP biosynthesis and promoted some grain quality characters of fragrant rice. Fragrant rice is famous for possessing a characteristic aroma and also fetches a high price in the international market because of the good grain quality 1,2. In the past two decades, many studies have conducted to investigate the compound of the aroma of fragrant rice. For example, the study of Widaja et al. 3 showed that the number of volatile compounds detected in the aroma exceeds 300 in both fragrant and non-fragrant rice varieties. Hashemi et al. 4 demonstrated there were more than 100 volatile compounds have been detected in the aroma of fragrant rice varieties. In recent years, with the development of many researches, it is established that 2-acetyl-1-pyrroline (2-AP) is the key compound in fragrant rice aroma 1,5,6. The process of 2-AP biosynthesis in fragrant rice is very complicated which involved many biochemical reactions while numerous studies have been conducted to understand the mechanism of 2-AP biosynthesis. An early study has evidenced that the expression of gene BADH2 which related to the betaine aldehyde dehydrogenase

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“…High temperature is one of the main factors adversely affecting rice grain yield and quality (Lanning, Siebenmorgen, Counce, Ambardekar, & Mauromoustakos, ; Liu, Wu, Ma, et al., ; Shi et al., ). Focusing on the negative influence of high temperature stress on physiological characteristics and the formation of grain yield and quality in rice, numerous studies have been conducted under field condition or in greenhouse (Jiang, Dian, & Wu, ; Kong et al., ; Li et al., ; Matsui, Omasa, & Horie, , ). It has been established that rice is most sensitive to high temperature stress during reproductive stage, that is, from panicle initiation to grain‐filling stage (Jagadish, Craufurd, & Wheeler, ; Jagadish et al., ; Prasad, Boote, Allen, Sheehy, & Thomas, ).…”

Section: Introductionmentioning

confidence: 99%

Translocation efficiencies and allocation of nitrogen, phosphorous and potassium in rice as affected by silicon fertilizer under high daytime temperature

Liu

Sun

et al. 2018

J Agronomy Crop Science

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High temperature has become a bottleneck limiting rice production in many rice‐growing districts. Silicon is considered as a beneficial element for rice development, being involved in mitigating adversity stress. In order to ascertain how high temperature and silicon affect nitrogen (N), phosphorous (P) and potassium (K) translocation efficiencies and allocation in rice plants, a field experiment with split plot design was conducted in two consecutive years. Silicon fertilizer treatments, including applying silicon fertilizer and without applying silicon fertilizer, were regarded as main plots. Temperature treatments, including high daytime temperature (HDT) and normal temperature (NT), were assigned as subplots. The results indicated that, as compared to NT, HDT reduced the translocation efficiencies of N, P and K in leaves and stems plus sheaths except for the K translocation efficiency in stems plus sheaths. Moreover, HDT decreased grain yield and the allocation rates of N, P and K in panicles at maturity. Under HDT, the application of silicon fertilizer obviously enhanced the N translocation efficiency of leaves and stems plus sheaths, and the K translocation efficiency of leaves. The application of silicon fertilizer increased grain yield and the allocation rates of N and K in panicles at maturity under HDT. Correlation analysis showed that rice grain yield was positively significantly correlated with N, P and K translocation efficiencies of leaves and their allocation rates in panicles at maturity. Conversely, grain yield was negatively related to the N and P allocation rates in leaves and stems plus sheaths at maturity. These results imply that HDT generated adverse effect on the translocation efficiency of nutrition in rice plants, which might be another damage induced by high temperature to the formation of rice grain yield. Additionally, silicon fertilizer could play a key role in positively regulating the N and K translocation efficiencies and allocation rates in rice under HDT.

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Short-term water management at early filling stage improves early-season rice performance under high temperature stress in South China

Cited by 77 publications

References 47 publications

Foliar application of selenium (Se) at heading stage induces regulation of photosynthesis, yield formation, and quality characteristics in fragrant rice

Foliar application of selenium (Se) at heading stage induces regulation of photosynthesis, yield formation, and quality characteristics in fragrant rice

Exogenous proline induces regulation in 2-acetyl-1-pyrroline (2-AP) biosynthesis and quality characters in fragrant rice (Oryza sativa L.)

Translocation efficiencies and allocation of nitrogen, phosphorous and potassium in rice as affected by silicon fertilizer under high daytime temperature

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