Effects of water, salt and nitrogen stress on sunflower (Helianthus annuus L.) at different growth stages

Ma, Tao; Zeng, Wenzhi; Li, Qi; Wu, Jingwei; Huang, Jiesheng

doi:10.4067/s0718-95162016005000075

Cited by 21 publications

(17 citation statements)

References 23 publications

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“…However, the long-term use of saline or brackish water irrigation may cause salt accumulation in root zones and increase the risk of soil salinization, thereby altering soil physicochemical properties. These changes in turn affect nutrient cycling and transformations, and especially the critical ecosystem processes of nitrogen transformations 24,25 .…”

Section: Discussionmentioning

confidence: 99%

Response of ammonia-oxidizing Bacteria and Archaea to long-term saline water irrigation in alluvial grey desert soils

Guo

Liang

et al. 2020

Sci Rep

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Soil nitrification via ammonia oxidation is a key ecosystem process in terrestrial environments, but little is known of how increasing irrigation of farmland soils with saline waters effects these processes. We investigated the effects of long-term irrigation with saline water on the abundances and community structures of ammonia-oxidizing bacteria (AOB) and archaea (AOA). Irrigation with brackish or saline water increased soil salinity (EC 1:5 ) and NH 4 -n compared to irrigation with freshwater, while no 3 -n, potential nitrification rates (PNR) and amoA gene copy numbers of AOA and AOB decreased markedly under irrigation regimes with saline waters. Moreover, irrigation with brackish water lowered AOA/ AOB ratios. PNR was positively correlated with AOA and AOB amoA gene copy numbers across treatments. Saline and brackish water irrigation significantly increased the diversity of AOA, as noted by Shannon index values, while saline water irrigation markedly reduced AOB diversity. In addition, irrigation with brackish or fresh waters resulted in higher proportions of unclassified taxa in the AOB communities. However, irrigation with saline water led to higher proportions of unclassified taxa in the AoA communities along with the Candidatus Nitrosocaldus genus, as compared to soils irrigated with freshwater. AOA community structures were closely associated with soil salinity, NO 3 − n, and pH, while AOB communities were only significantly associated with NO 3 − N and pH. These results suggest that salinity was the dominant factor affecting the growth of ammonia-oxidizing microorganisms and community structure. These results can provide a scientific basis for further exploring the response mechanism of ammonia-oxidizing microorganisms and their roles in nitrogen transformation in alluvial grey desert soils of arid areas.index showed a significant (P < 0.001) opposite relationship. In addition, the SW treatment soils had a significantly lower AOB Shannon index (P = 0.002) compared to the FW soils, but a significantly higher Simpson index value (P = 0.003). The BW treatment did not have a significant effect on AOB diversity index. Scientific RepoRtS | (2020) 10:489 | https://doi.Scientific RepoRtS | (2020) 10:489 | https://doi.org/10.1038/s41598-019-57402-xwww.nature.com/scientificreports www.nature.com/scientificreports/ Nitrosomonadaceae and Nitrosopumilaceae were the two most dominant families in the dataset. The relative abundances of Nitrosomonadaceae were significantly greater in the FW treatment soils than in those of the BW and SW treatments (P < 0.001). However, no significant differences were observed for the relative abundances of Nitrosopumilaceae among the FW, BW, and SW treatment soils. Nitrosopumilus and Nitrosospira were the two most dominant genera in the sequencing datasets. The relative abundances of Nitrosospira were significantly higher in the FW treatment soils than in those of the BW and SW treatments (P < 0.001). However, no significant differences were observed for the relative abundances of Ni...

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Section: Discussionmentioning

confidence: 99%

Response of ammonia-oxidizing Bacteria and Archaea to long-term saline water irrigation in alluvial grey desert soils

Guo

Liang

et al. 2020

Sci Rep

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“…Various screening methods of salinity tolerance have been developed in rapeseed based on multi-index results [10,23,31,32]. The membership function value (MFV) is an appreciate screening method for different stress conditions; drought stress [33,34], heat stress [35], nitrogen stress [36], and salt stress [31]. Wu et al [31] evaluated the salt tolerance of B. napus germplasm using the MFV method in the germination stage but an effective screening method in the seedling stage not presented.…”

Section: Introductionmentioning

confidence: 99%

Stomatal and Photosynthetic Traits Are Associated with Investigating Sodium Chloride Tolerance of Brassica napus L. Cultivars

Mohamed

Shalby

Bai

et al. 2020

Plants

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The negative effects of salt stress vary among different rapeseed cultivars. In this study, we investigated the sodium chloride tolerance among 10 rapeseed cultivars based on membership function values (MFV) and Euclidean cluster analyses by exposing seedlings to 0, 100, or 200 mM NaCl. The NaCl toxicity significantly reduced growth, biomass, endogenous K+ levels, relative water content and increased electrolyte leakage, soluble sugar levels, proline levels, and antioxidant enzyme activities. SPAD values were highly variable among rapeseed cultivars. We identified three divergent (tolerant, moderately tolerant, and sensitive) groups. We found that Hua6919 and Yunyoushuang2 were the most salt-tolerant cultivars and that Zhongshuang11 and Yangyou9 were the most salt-sensitive cultivars. The rapeseed cultivars were further subjected to photosynthetic gas exchange and anatomical trait analyses. Among the photosynthetic gas exchange and anatomical traits, the stomatal aperture was the most highly correlated with salinity tolerance in rapeseed cultivars and thus, is important for future studies that aim to improve salinity tolerance in rapeseed. Thus, we identified and characterized two salt-tolerant cultivars that will be useful for breeding programs that aim to develop salt-tolerant rapeseed.

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“…It is grown around the world and is a popular crop in countries that have salt affected soils (Masor, 2011). The soil salinity level was the main limiting factor for vegetative growth of sunflower (Ma et al, 2016). Sunflower (Helianthus annuus L.) has been rated as moderately salt-resistant with no significant yield reduction up to 4.8 dS m −1 , and variability for salt resistance has been detected within this crop (Ceccoli et al, 2012;Machekposhti et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Morphological and biochemical changes in response to salinity in sunflower (Helianthus annus L.) cultivars

Taher

Beyaz

Javani

et al. 2018

Italian Journal of Agronomy

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This study was conducted to evaluate the alterations of some morphological and biochemical parameters of sunflower cultivars ('08-TR-003', 'TR-3080' and 'TARSAN-1018') under salt stress. For this aim, the seedling of sunflower cultivars was irrigated with tap water as a control, and with salinized water with 50, 150 and 250 mM NaCl for 30 days under controlled conditions. Salinity caused an apparent reduction in morphological parameters (plant height, leaf area, fresh weight, dry matter and water content) in all cultivars. Salt stress significantly (P<0.01) reduced the activity of glutathione reductase (GR) and ascorbate peroxidase (APX) activities in all sunflower cultivars expect for superoxide dismutase (SOD) activity. According to our results, SOD seems to play a key role in the antioxidative process in salt treated sunflower plants. Proline and MDA contents were significantly (P<0.05) increased under salt stress in all cultivars. Among the cultivars, 'TR-3080' had greater values in terms of morphological (plant height, leaf area, fresh weight, water content) and biochemical (GR, APX and SOD (secondly) activities and proline contents) parameters. In the light of these findings, cv. 'TR-3080' seems to be less affected by salt stress.

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Effects of water, salt and nitrogen stress on sunflower (Helianthus annuus L.) at different growth stages

Cited by 21 publications

References 23 publications

Response of ammonia-oxidizing Bacteria and Archaea to long-term saline water irrigation in alluvial grey desert soils

Response of ammonia-oxidizing Bacteria and Archaea to long-term saline water irrigation in alluvial grey desert soils

Stomatal and Photosynthetic Traits Are Associated with Investigating Sodium Chloride Tolerance of Brassica napus L. Cultivars

Morphological and biochemical changes in response to salinity in sunflower (Helianthus annus L.) cultivars

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