Differential Proteins Expressed in Rice Leaves and Grains in Response to Salinity and Exogenous Spermidine Treatments

Saleethong, Paweena; Roytrakul, Sittiruk; Kong-ngern, Kanlaya; Theerakulpisut, Piyada

doi:10.1016/j.rsci.2016.01.002

Cited by 10 publications

(6 citation statements)

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“…In early senescence, SOD and CAT can remove ROS [86,87]. SOD catalyzes [73,85,88]. In our study, activities of SOD, POD and APX in es2 were significantly higher than those in WYG7, while activity of CAT was significantly lower than that of WYG7 (Fig.…”

Section: Discussionsupporting

confidence: 46%

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Rice EARLY SENESCENCE 2, encoding an inositol polyphosphate kinase, is involved in leaf senescence

et al. 2020

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Background Early leaf senescence influences yield and yield quality by affecting plant growth and development. A series of leaf senescence-associated molecular mechanisms have been reported in rice. However, the complex genetic regulatory networks that control leaf senescence need to be elucidated. Results In this study, an early senescence 2 ( es2 ) mutant was obtained from ethyl methanesulfonate mutagenesis (EMS)-induced mutational library for the Japonica rice cultivar Wuyugeng 7 (WYG7). Leaves of es2 showed early senescence at the seedling stage and became severe at the tillering stage. The contents of reactive oxygen species (ROS) significantly increased, while chlorophyll content, photosynthetic rate, catalase (CAT) activity significantly decreased in the es2 mutant. Moreover, genes which related to senescence, ROS and chlorophyll degradation were up-regulated, while those associated with photosynthesis and chlorophyll synthesis were down-regulated in es2 mutant compared to WYG7. The ES2 gene, which encodes an inositol polyphosphate kinase (OsIPK2), was fine mapped to a 116.73-kb region on chromosome 2. DNA sequencing of ES2 in the mutant revealed a missense mutation, ES2 was localized to nucleus and plasma membrane of cells, and expressed in various tissues of rice. Complementation test and overexpression experiment confirmed that ES2 completely restored the normal phenotype, with chlorophyll contents and photosynthetic rate increased comparable with the wild type. These results reveal the new role of OsIPK2 in regulating leaf senescence in rice and therefore will provide additional genetic evidence on the molecular mechanisms controlling early leaf senescence. Conclusions The ES2 gene, encoding an inositol polyphosphate kinase localized in the nucleus and plasma membrane of cells, is essential for leaf senescence in rice. Further study of ES2 will facilitate the dissection of the genetic mechanisms underlying early leaf senescence and plant growth.

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Section: Discussionsupporting

confidence: 46%

“…CAT is the major H 2 O 2 -scavenging enzyme. APX also plays an important role in control of H 2 O 2 level in cells [ 73 , 85 , 88 ]. In our study, activities of SOD, POD and APX in es2 were significantly higher than those in WYG7, while activity of CAT was significantly lower than that of WYG7 (Fig.…”

Section: Discussionmentioning

confidence: 99%

Rice EARLY SENESCENCE 2, encoding an inositol polyphosphate kinase, is involved in leaf senescence

et al. 2020

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“…As an SA-mediated increase in GB levels can improve overall plant growth (Khan, Fatma, Per, Anjum, & Khan, 2015), exogenous SA was expected to promote the accumulation of this osmolyte in pigeonpea and lablab to suppress salt stress. Exogenous PAs have been documented to reduce salinity stress-induced damage, including the accumulation of compatible osmolytes (Saleethong, Roytrakul, Kong-Ngern, & Theerakulpisut, 2016). In contrast, our findings showed that exogenous Spd decreased GB accumulation (Figure 4).…”

Section: -Interaction Between Compounds (Sa Andcontrasting

confidence: 56%

Pretreatment of forage legumes under moderate salinity with exogenous salicylic acid or spermidine

et al. 2020

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The present study aims to determine whether exogenous salicylic acid (SA) or spermidine (Spd) has any protective effect against salt stress. Seeds were subjected to 0, 20, 40, and 60 mM NaCl with or without salicylic acid or spermidine (0.5 mM) for 10 days. The evaluated variables were germination rate, shoot and root dry masses, glycine betaine content, lipid peroxidation, and the activities of superoxide dismutase (SOD), catalase (CAT), and ascorbate peroxidase (APX). The data were subjected to Tukey’s test (p ≤ 0.05). There was a growth increase, especially in plant shoots. The reduction in lipid peroxidation, as indicated by lower malondialdehyde (MDA) levels, can be explained by an increase in antioxidant activity when SA and Spd were added. When compared to CAT and APX, SOD was the least responsive enzyme to the addition of both SA and Spd in salt-stressed plants. SA and Spd partially reduced the effects of moderate salt stress in both plant species; however, Spd addition had better results than SA in terms of suppressing oxidative stress. Lablab plants were more vigorous than pigeonpea plants.

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“…Na + influx affects photosynthesis by disrupting the proton-motive force and chloroplast function and by interfering with the CO 2 -fixing enzymes (van Zelm et al, 2020;Zhang et al, 2010). Some chloroplastencoded genes, including oxygen-evolving enhancer proteins 2 and 3 (OEE 2 and 3), PSII 22 kDa protein, and F-type ATPase, are associated with the maintenance of the photosystem and electron transport activity under salt stress (Saleethong et al, 2016). Herein, these genes were suppressed in both cultivars under salt stress.…”

Section: K + Homeostasis and Photosynthesis Than Ss 212mentioning

confidence: 99%

Unravelling the distinctive growth mechanism of proso millet (Panicum miliaceum L.) under salt stress: From root‐to‐leaf adaptations to molecular response

Yuan

Liu

et al. 2021

GCB Bioenergy

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Long-term climate change and periodic environmental extremes threaten the global crop productivity and yield of energy crops and impede the sustainable development of modern agriculture (Cappelli et al., 2015;Gupta et al., 2020). These challenges are exacerbated by soil salinization caused by natural or human activities, leading to a more bioenergy-scarce world (Litalien & Zeeb, 2020;Sahab et al., 2021). Therefore, the development of salt-tolerant energy crops is becoming increasingly important. High salinity typically results from the excessive accumulation

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Differential Proteins Expressed in Rice Leaves and Grains in Response to Salinity and Exogenous Spermidine Treatments

Cited by 10 publications

References 64 publications

Rice EARLY SENESCENCE 2, encoding an inositol polyphosphate kinase, is involved in leaf senescence

Rice EARLY SENESCENCE 2, encoding an inositol polyphosphate kinase, is involved in leaf senescence

Pretreatment of forage legumes under moderate salinity with exogenous salicylic acid or spermidine

Unravelling the distinctive growth mechanism of proso millet (Panicum miliaceum L.) under salt stress: From root‐to‐leaf adaptations to molecular response

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