Nitrogen fixation symbiosis and salt tolerance of the boreal woody species Elaeagnus commutata

Shao, Jianfei; Markham, James W.; Renault, Sylvie

doi:10.1007/s11738-020-03088-y

Cited by 6 publications

(8 citation statements)

References 44 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This result indicates that partial stomatal closure at moderate salt stress enhanced WUE at stomatal and leaf levels in cotton plants. The relatively less reduction of A n in comparison with g s and T r under salt stress could be associated with the enhanced N and chlorophyll content in leaf (Figure 5a,b), as affirmed by previous studies that salt stress improved leaf N concentration and chlorophyll content (Akram, 2014; Shao et al., 2020), which in some extent sustain A n in the plants grown under salt stress condition.…”

Section: Discussionsupporting

confidence: 78%

See 1 more Smart Citation

Growth and physiological responses of cotton plants to salt stress

Wei

Liu

et al. 2021

J Agronomy Crop Science

View full text Add to dashboard Cite

show abstract

Section: Discussionsupporting

confidence: 78%

“…This result indicates that partial stomatal closure at moderate salt stress enhanced WUE at stomatal and leaf levels in cotton plants. (Akram, 2014;Shao et al, 2020), which in some extent sustain A n in the plants grown under salt stress condition.…”

Section: Discussionmentioning

confidence: 94%

Growth and physiological responses of cotton plants to salt stress

Wei

Liu

et al. 2021

J Agronomy Crop Science

View full text Add to dashboard Cite

show abstract

“…This is the first field study to show a reduction in nitrogenfixing vesicles in nodules in response to environmental conditions. In a greenhouse experiment, we have also shown a similar reduction in vesicles in response to salt stress (Shao et al 2019). The reduction in the proportion of N-fixing vesicles in the N-fertilized shrubs in the forest, but not in the open or in response to P fertilizer, suggests that under forest conditions, N fertilization makes devoting resources to nodules activity particularly disadvantageous.…”

Section: Discussionsupporting

confidence: 63%

Soil moisture, N, P, and forest cover effects on N fixation in alders in the southern boreal forest

Markham

Anderson

2021

Ecosphere

Self Cite

View full text Add to dashboard Cite

Outside of tropical and arid regions, plant productivity is limited by the availability of soil N.Ironically, these are the regions where N-fixing plants are restricted to early successional habitats. The energy cost of N fixation has been used to explain the paucity of N-fixing plants in late-successional ecosystems, and models predict reduced light and increased soil N availability will reduce N-fixing plant success. The lack of success of N-fixing plants has also been explained by their greater need for some elements, especially phosphorus. We examined the effect of N and P fertilizer over four years on N fixation in Alnus alnobetula spp. crispa in a mature Pinus banksiana forest in the southern boreal forest, and an adjacent site where wildfire had removed the tree canopy. We also monitored N fixation throughout two growing seasons examined the effect of artificial shading on photosynthesis. The addition of N or P fertilizer resulted in a 60% decrease in plant nodule nitrogenase activity. N fertilizer also reduced the proportion of cells in the root nodules containing N-fixing vesicles in the forest site. Shrubs in the forest had the highest photosynthetic rate when measured on a leaf mass basis, indicating an increased carbon capture efficiency compared with shrubs in the open. Over the course of two growing seasons, soil temperature had a positive effect on specific nitrogenase activity, and soil in the open site was warmer than soil in the forest in the spring. However, as soil moisture decreased, temperature was a weaker predictor of nitrogenase activity. Although all shrubs consistently acquired most of their N from fixation, shrubs in the forest derived more than shrubs in the open, which were more water limited. Overall, these results show that N-fixing plants may benefit from being in the understory for improved water balance in this region of the boreal forest. As such, light availability may not be the primary factor limiting the abundance of N-fixing shrubs.

show abstract

“…Furthermore, nitrogenase activity in nodules is insignificant at 200 mM NaCl ( Duro et al., 2016a ; Duro et al., 2016b ; Mansour et al, 2016 ). Similarly, 100 mM NaCl concentration has a significant inhibitory effect on nodule function in Elaeagnus commutate ( Shao, Markham & Renault, 2020 ). Previous studies have revealed that salt tolerance in C. glauca is linked to photosynthetic, primary metabolic adjustments and to an effective antioxidant machinery ( Graça et al, 2019 ; Batista-Santos et al, 2015 ; Jorge et al, 2019 ).…”

Section: Discussionmentioning

confidence: 99%

Transcriptome and structure analysis in root of Casuarina equisetifolia under NaCl treatment

Wang

Zhang

Zhenfei

et al. 2021

PeerJ

View full text Add to dashboard Cite

Background High soil salinity seriously affects plant growth and development. Excessive salt ions mainly cause damage by inducing osmotic stress, ion toxicity, and oxidation stress. Casuarina equisetifolia is a highly salt-tolerant plant, commonly grown as wind belts in coastal areas with sandy soils. However, little is known about its physiology and the molecular mechanism of its response to salt stress. Results Eight-week-old C. equisetifolia seedlings grown from rooted cuttings were exposed to salt stress for varying durations (0, 1, 6, 24, and 168 h under 200 mM NaCl) and their ion contents, cellular structure, and transcriptomes were analyzed. Potassium concentration decreased slowly between 1 h and 24 h after initiation of salt treatment, while the content of potassium was significantly lower after 168 h of salt treatment. Root epidermal cells were shed and a more compact layer of cells formed as the treatment duration increased. Salt stress led to deformation of cells and damage to mitochondria in the epidermis and endodermis, whereas stele cells suffered less damage. Transcriptome analysis identified 10,378 differentially expressed genes (DEGs), with more genes showing differential expression after 24 h and 168 h of exposure than after shorter durations of exposure to salinity. Signal transduction and ion transport genes such as HKT and CHX were enriched among DEGs in the early stages (1 h or 6 h) of salt stress, while expression of genes involved in programmed cell death was significantly upregulated at 168 h, corresponding to changes in ion contents and cell structure of roots. Oxidative stress and detoxification genes were also expressed differentially and were enriched among DEGs at different stages. Conclusions These results not only elucidate the mechanism and the molecular pathway governing salt tolerance, but also serve as a basis for identifying gene function related to salt stress in C. equisetifolia.

show abstract

Nitrogen fixation symbiosis and salt tolerance of the boreal woody species Elaeagnus commutata

Cited by 6 publications

References 44 publications

Growth and physiological responses of cotton plants to salt stress

Growth and physiological responses of cotton plants to salt stress

Soil moisture, N, P, and forest cover effects on N fixation in alders in the southern boreal forest

Transcriptome and structure analysis in root of Casuarina equisetifolia under NaCl treatment

Contact Info

Product

Resources

About