Nitrate and Ammonium Contribute to the Distinct Nitrogen Metabolism of Populus simonii during Moderate Salt Stress

Meng, Sen; Су, Ли; Li, Yiming; Wang, Yinjuan; Zhang, Chunxia; Zhong, Zhao

doi:10.1371/journal.pone.0150354

Cited by 57 publications

(44 citation statements)

References 43 publications

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“…Nitrogen (N) metabolism, a central process for plant growth and development, is strongly influenced by salinity. Excess salt disturbs different steps of N metabolism, namely nitrate (NO 3 - ) or ammonium (NH 4 + ) uptake, N transport and assimilation into amino acids, and protein synthesis [ 91 ]. The absorbed N is reduced to nitrite by nitrate reductase ( NR ) and then to NH 4 + by nitrite reductase (NiR).…”

Section: Discussionmentioning

confidence: 99%

Transcriptomic Analysis of Short-Term Salt Stress Response in Watermelon Seedlings

Song

Joshi²,

Joshi³

2020

IJMS

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Watermelon (Citrullus lanatus L.) is a widely popular vegetable fruit crop for human consumption. Soil salinity is among the most critical problems for agricultural production, food security, and sustainability. The transcriptomic and the primary molecular mechanisms that underlie the salt-induced responses in watermelon plants remain uncertain. In this study, the photosynthetic efficiency of photosystem II, free amino acids, and transcriptome profiles of watermelon seedlings exposed to short-term salt stress (300 mM NaCl) were analyzed to identify the genes and pathways associated with response to salt stress. We observed that the maximal photochemical efficiency of photosystem II decreased in salt-stressed plants. Most free amino acids in the leaves of salt-stressed plants increased many folds, while the percent distribution of glutamate and glutamine relative to the amino acid pool decreased. Transcriptome analysis revealed 7622 differentially expressed genes (DEGs) under salt stress, of which 4055 were up-regulated. The GO analysis showed that the molecular function term “transcription factor (TF) activity” was enriched. The assembled transcriptome demonstrated up-regulation of 240 and down-regulation of 194 differentially expressed TFs, of which the members of ERF, WRKY, NAC bHLH, and MYB-related families were over-represented. The functional significance of DEGs associated with endocytosis, amino acid metabolism, nitrogen metabolism, photosynthesis, and hormonal pathways in response to salt stress are discussed. The findings from this study provide novel insights into the salt tolerance mechanism in watermelon.

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Section: Discussionmentioning

confidence: 99%

Transcriptomic Analysis of Short-Term Salt Stress Response in Watermelon Seedlings

Song

Joshi²,

Joshi³

2020

IJMS

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“…However, the efficiency in N use was the one that suffered the greatest reduction (-60%). In fact, salinity has been shown to reduce several parameters related to N metabolism in plants, such as NO 3 absorption, free aminoacid, leaf protein, and activity of the enzymes nitrate reductase, glutamine synthase, and glutamate synthetase (SOUZA et al, 2016;KAUSAR et al, 2014;MENG et al, 2016;IQBAL et al, 2015;WANG et al, 2012;DEBOUBA et al, 2006;SILVEIRA et al, 2001), and these reductions have been higher in the varieties more sensitive to salinity (KAUSAR et al, 2014). Thus, given the importance of this nutrient for plant physiology and growth, studies related to N metabolism could also be prioritized in studies of cassava tolerance to salinity.…”

Section: Discussionmentioning

confidence: 99%

Salinity reduces nutrients absorption and efficiency of their utilization in cassava plants

et al. 2018

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The objective of this research was to evaluate the influence of salinity on the absorption and utilization of nutrients by cassava. For the study, cassava was submitted to four saline concentrations: 0, 20, 40, and 60mM NaCl. Results showed that the absorption of all nutrients, except nitrogen (N), was reduced by salinity, with highest reduction for potassium (K). However, all nutrients were maintained at concentrations which did not indicate mineral deficiency problem. The abnormal concentration of calcium in the tuberous roots may have been one of the factors that contributed to the lower growth of this organ and of the plant as a whole. Transports of nitrogen, potassium, phosphorus and sulfur from root to the aerial part was higher under salinity treatment. Efficiency in the use of all the nutrients, mainly N, was reduced due to salinity. Given that: (i) the absorption of K was the most impaired, (ii) there was abnormal accumulation of Ca in tuberous roots, and (iii) the efficiency in the use of N was the most affected, it is suggested to prioritize studies on these three issues, as a way to better understand the aspects related to the tolerance/sensitivity of cassava plants to salinity.

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“…Secara morfologi cekaman tersebut mempengaruhi pertumbuhan daun menjadi lebih kecil dan warna akar lebih coklat (Gambar 1). Hal ini diduga berhubungan dengan karakteristik dinding sel yang berubah sebagai respons terhadap cekaman garam bersamaan dengan perubahan komposisi kimia (Meng et al, 2016).…”

Section: Hasil Dan Pembahasanunclassified

Mekanisme Adaptasi Jagung terhadap Cekaman NaCl: Pola Serapan Anion dan Kation

Utama¹,

Haryoko²

2020

J Agron Indonesia

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Salt solubility is the abiotic pressure which has the most effect on the loss of plant quantity and quality. Salinity not only makes plants stressful but also presents severe constraints on crop production so an attempt to understand plant adaptation mechanisms is important for expanding agricultural production on saline soils. This study aimed to obtain a mechanism for the adaptation of hybrid and composites maize to NaCl stress through anion and cation absorption patterns. The experiments were carried out at the LLDikti Region X Laboratory from May to August 2016. The experiments were arranged in a factorial complete randomized design with three replications. The first factor was corn varieties, namely: hybrid corn (Pioneer 22 and Bisi 12), and composite corn (Bisma and Sukmaraga). The second factor was level of NaCl, namely: 0.0 mg kg-1 NaCl pH 5.0, and 4,000 mg kg-1 NaCl pH 5.0. Measurement of anions and cations using Spectroquant Thermoreator TR Nova 420. The adaptability of hybrid maize and composites to NaCl stress occurred through the mechanism of anion absorption and cation metabolism. The difference in the percentage of NO3-, NO2-, PO4-, NH4+, and K+ levels between hybrid maize varieties and composites showed a difference in the adaptation ability of maize varieties to salinity stress. Keywords: abiotic, mechanism, salinity, varieties

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Nitrate and Ammonium Contribute to the Distinct Nitrogen Metabolism of Populus simonii during Moderate Salt Stress

Cited by 57 publications

References 43 publications

Transcriptomic Analysis of Short-Term Salt Stress Response in Watermelon Seedlings

Transcriptomic Analysis of Short-Term Salt Stress Response in Watermelon Seedlings

Salinity reduces nutrients absorption and efficiency of their utilization in cassava plants

Mekanisme Adaptasi Jagung terhadap Cekaman NaCl: Pola Serapan Anion dan Kation

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