Nitrogen metabolism correlates with the acclimation of photosynthesis to short-term water stress in rice (Oryza sativa L.)

Zhong, Chen; Cao, Xiaochuang; Bai, Zhigang; Zhang, Junhua; Zhu, Li; Huang, Jikun; Jin, Qing

doi:10.1016/j.plaphy.2018.01.024

Cited by 69 publications

(49 citation statements)

References 64 publications

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“…Previous studies showed that drought stress increased the SOD, POD, and CAT activities in soybean [58] and alfalfa [4]. In this study, short-term drought stress (15)(16)(17)(18)(19)(20)(21)(22)(23)(24)(25)(26)(27)(28)(29)(30) increased the activities of antioxidant enzymes, including SOD, POD, and CAT ( Figure 1A-C), indicating that the antioxidant enzyme system was involved in the early drought resistance response of soybean. However, once the ROS produced by plants exceed the scavenging capacity of antioxidant enzymes, the antioxidant system will be destroyed [15,59].…”

Section: Discussionsupporting

confidence: 68%

“…However, when N supply does not meet requirements of growth and development, soybean will remobilize N accumulated in leaves to the grain, accompanied by diminishing photosynthetic capacity, thus decreasing yield potential [19]. Thus, coordination between N supply and N utilization is crucial to plant growth and development [17,67]. During seed-filling stages, N concentration in leaves decreased with the development of soybean growth process (Figures 2A and 6), indicating that N was transferred from leaf to grain to meet the demand of seed development and growth.…”

Section: Discussionmentioning

confidence: 99%

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Effect of Drought Stress at Reproductive Stages on Growth and Nitrogen Metabolism in Soybean

Zhao

Chen

et al. 2020

Agronomy

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This study aims to determine variability among soybean (Glycine max (L.) Merr.) cultivars under drought conditions and how nitrogen metabolites, metabolism-related enzymes, and gene expression vary during soybean growth. Three soybean cultivars, Shennong17 (CV.SN17), Shennong8 (CV.SN8), and Shennong12 (CV.SN12), were grown in pot culture and subjected to drought stress at reproductive stages for 45 days. The results showed that long-term drought stress decreased biomass allocation to reproductive organs, weakened antioxidant capacity, and reduced seed weight, effects that were less pronounced in CV.SN12 compared with those in CV.SN8 and CV.SN17. Drought stress decreased the concentrations of nitrogen and soluble protein but increased nitrate concentration in leaves. This was related to the significantly reduction of nitrogen metabolism efficiency, including decreased activities of nitrogen metabolism enzymes, and downregulated expression of GmNR, GmNiR, GmGS, and GmGOGAT. Drought stress increased the concentrations of free amino acid, proline, and soluble sugar in leaves to enhance the osmotic adjustment ability. Furthermore, soybean seed weight showed significantly correlation (p < 0.05) with nitrogen-metabolism-related parameters. Based on the performance of growth, nitrogen metabolism, and yield attributes, CV.SN12 showed the highest tolerance to drought, followed by CV.SN8 and CV.SN17. In addition, these nitrogen-metabolism-related parameters could be used in soybeans to select for drought tolerance.

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Section: Discussionsupporting

confidence: 68%

Section: Discussionmentioning

confidence: 99%

Effect of Drought Stress at Reproductive Stages on Growth and Nitrogen Metabolism in Soybean

Zhao

Chen

et al. 2020

Agronomy

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“…For example, the addition of 10 µmol L −1 IAA to Cr stressed pea seedlings increased the total N contents of roots and shoots [11]. Moreover, the synchronous increases observed in NO 3 − content and NR activity in spinach seedlings could be due to the compartmentalization of NO 3 − assimilation in leaves [53], since NO 3 − is mainly stored in vacuoles [54], and isolated from NR, which is located in the cytoplasm [55]. The avoidance of excess NH 4 + accumulation is generally viewed as an important strategy for withstanding stress damage in plants [56].…”

Section: Discussionmentioning

confidence: 95%

Exogenous of Indole-3-Acetic Acid Application Alleviates Copper Toxicity in Spinach Seedlings by Enhancing Antioxidant Systems and Nitrogen Metabolism

Gong

Wang

et al. 2019

Toxics

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Indole-3-acetic acid (IAA) is a potential mediator in the protection of plants from copper (Cu) toxicity and the enhancement of Cu tolerance. In this paper, spinach (Spinacia oleracea L.) seedlings were cultivated in soil containing 700 mg kg−1 Cu and the leaves of seedlings were sprayed with different concentrations of IAA. Exogenous IAA treatment reduced the malondialdehyde (MDA) concentrations in Cu-stressed seedlings and increased biomass, proline content, and the activities of antioxidant enzymes. Exogenous IAA treatment also increased the levels of nitrogen (N) assimilation compounds and the activities of N-metabolizing enzymes, but reduced NH4+ content. Notably, lower concentrations of IAA (10–40 mg L−1) increased the Cu concentrations in roots and reduced the Cu concentrations in leaves, while higher concentrations of IAA (50 mg L−1) reduced the Cu concentrations in both roots and leaves to the lowest levels. The findings indicated that the application of IAA reduced Cu accumulation, alleviated Cu toxicity, and enhanced Cu tolerance in spinach seedlings. IAA application could be used as an alternative strategy for reducing Cu accumulation in vegetable crops and for remediating Cu-contaminated soil, in turn reducing the hazardous effects of heavy metal contamination on human health and the environment.

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“…Root length and root weight were measured by a standard ruler and 1/1000 balance; if 60% of the length of the root appeared blackish or brownish, it was calculated as a black root, and the rest were calculated as white roots; the roots shorter than 1 cm in length or decomposed were not calculated in root length and root weight. Root bleeding was collected by the cotton traps method [16], SS was performed according to Hu et al [17], GOT activity was measured through the method of Sax et al [18], and GPT and GS activity was tested via the methods of Zhong et al [19] and Yu and Zhang [20], respectively.…”

Section: Samples and Measurementmentioning

confidence: 99%

Negative and Positive Impacts of Rape Straw Returning on the Roots Growth of Hybrid Rice in the Sichuan Basin Area

et al. 2019

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Incorporating oilseed-rape straw in soil is one of the effective methods for enhancing the use efficiency of agricultural resources in the rape-rice rotation system. However, the impacts of oilseed-rape straw incorporation on root growth and dynamic changes in soil are still unclear. In order to provide a deeper understanding of the oilseed rape straw return on rice growth and productivity, the experiment was conducted in the field and in a specially-designed pots system from 2016 to 2017 by means of two straw returning methods and four straw returning amounts. In the early stage of rice growth (0–36 days after rice transplanting) the straw returning treatments decreased 1.0–8.6 mg/plant in bleeding density and 0.10–6.11, 0.06–0.31, and 0.52–0.84 μmol/(g h) in the activity of glutamine synthetase (GS), glutamic-oxalacetic transaminase (GOT), and glutamic-pyruvic transaminase (GPT), respectively. Oilseed rape straw returned by mulching induced negative impacts on new germinating roots in 0–10 cm of soil, while the negative impacts were observed on roots in 10–30 cm of soil for straw returned by plowing. In the later stage of rice growth (56–75 days after rice transplanting), oilseed rape straw returning produced some positive impacts on rice roots, which enhanced the yield of rice. Conclusively, our findings suggested that dynamic root growth and the activity of root enzymes are two major factors behind the slow reviving of rice after transplanting in the straw returning field. Plowing is a more appropriate method of straw returning than mulching in the rape-rice rotation system in the Sichuan basin area, with a straw incorporation rate of 3.0 t/hm2.

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Nitrogen metabolism correlates with the acclimation of photosynthesis to short-term water stress in rice (Oryza sativa L.)

Cited by 69 publications

References 64 publications

Effect of Drought Stress at Reproductive Stages on Growth and Nitrogen Metabolism in Soybean

Effect of Drought Stress at Reproductive Stages on Growth and Nitrogen Metabolism in Soybean

Exogenous of Indole-3-Acetic Acid Application Alleviates Copper Toxicity in Spinach Seedlings by Enhancing Antioxidant Systems and Nitrogen Metabolism

Negative and Positive Impacts of Rape Straw Returning on the Roots Growth of Hybrid Rice in the Sichuan Basin Area

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