Effect of salinity on germination, phytase activity and phytate content in lettuce seedling

Nasri, Nawel; Kaddour, Rym; Rabhi, Mokded; Plassard, Claude; Lachâal, Mokhtar

doi:10.1007/s11738-010-0625-4

Cited by 43 publications

(40 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It has been reported that GA functions in diametrically opposed capacities in response to abiotic stresses. GA is involved in stress tolerance during germination and seedling establishment (Kabar and Baltepe, 1990;Kaur et al, 1998;Nasri et al, 2011), whereas it is involved in stress intolerance in established vegetative tissues (Sarkar et al, 2004;Achard et al, 2006). In the tissues of Arabidopsis, DELLA/RGA-LIKE3 is induced by the transcriptional activator AtCBF1/DREB1B in response to cold and water deprivation (Achard et al, 2008).…”

Section: Discussionmentioning

confidence: 99%

“…GA functions to mediate both tolerance and intolerance pathways involved in the responses to different abiotic stresses. Application of exogenous GA to plant seeds reverses the salt stress-and heat stress-induced inhibition of germination and seedling establishment (Kabar and Baltepe, 1990;Kaur et al, 1998;Nasri et al, 2011). By contrast, salt stress in Arabidopsis (Arabidopsis thaliana) seedlings leads to a decrease of GA levels, the accumulation of DELLA proteins, and the suppression of plant growth, which ultimately confers tolerance to stress (Achard et al, 2006).…”

mentioning

confidence: 99%

See 1 more Smart Citation

Reduction of Gibberellin by Low Temperature Disrupts Pollen Development in Rice

et al. 2014

View full text Add to dashboard Cite

Microsporogenesis in rice (Oryza sativa) plants is susceptible to moderate low temperature (LT; approximately 19°C) that disrupts pollen development and causes severe reductions in grain yields. Although considerable research has been invested in the study of cool-temperature injury, a full understanding of the molecular mechanism has not been achieved. Here, we show that endogenous levels of the bioactive gibberellins (GAs) GA 4 and GA 7 , and expression levels of the GA biosynthesis genes GA20ox3 and GA3ox1, decrease in the developing anthers by exposure to LT. By contrast, the levels of precursor GA 12 were higher in response to LT. In addition, the expression of the dehydration-responsive element-binding protein DREB2B and SLENDER RICE1 (SLR1)/DELLA was up-regulated in response to LT. Mutants involved in GA biosynthetic and response pathways were hypersensitive to LT stress, including the semidwarf mutants sd1 and d35, the gain-of-function mutant slr1-d, and gibberellin insensitive dwarf1. The reduction in the number of sporogenous cells and the abnormal enlargement of tapetal cells occurred most severely in the GA-insensitive mutant. Application of exogenous GA significantly reversed the male sterility caused by LT, and simultaneous application of exogenous GA with sucrose substantially improved the extent of normal pollen development. Modern rice varieties carrying the sd1 mutation are widely cultivated, and the sd1 mutation is considered one of the greatest achievements of the Green Revolution. The protective strategy achieved by our work may help sustain steady yields of rice under global climate change.

show abstract

Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 99%

Reduction of Gibberellin by Low Temperature Disrupts Pollen Development in Rice

et al. 2014

View full text Add to dashboard Cite

show abstract

“…One unit of enzyme activity is defined as amount of enzyme liberating 1 nmol of p-nitrophenol per minute (Saluja et al, 1989). Phytase activity was performed by measuring the release of phosphate from sodium phytate and was carried as previously described (Nasri et al, 2011).…”

Section: Extraction and Assay Of Acid Phosphatase And Phytasementioning

confidence: 99%

“…This lettuce variety, Vista, employed in this study was selected as representative of the most sensitive variety to salt under salt treatment in germination step (Nasri et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

The effect of osmopriming on germination, seedling growth and phosphatase activities of lettuce under saline condition

Nasri¹,

Kaddour²,

Mahmoudi³

et al. 2011

Afr. J. Biotechnol.

View full text Add to dashboard Cite

This experiment was conducted to evaluate the effects of osmopriming with KNO 3 on germination traits, seedling growth and phosphatase activities of lettuce (Lactuca sativa L.) seeds under salinity condition. Lettuce seeds (Var. Vista) were primed with KNO 3 (0.05%) for 2 h at 25°C in the dark. Primed and nonprimed seeds were germinated on distilled water containing 0 or 100 mM NaCl, for four days. Results show that germination percentage, root and shoot length and seedling fresh weight of primed seeds was higher than that of non-primed seeds in saline condition. Priming also increased acid phosphatase and phytase activities in the roots, shoots and cotyledons under salt stress. It seems that seed priming can be used for improving performance of lettuce seeds and seedlings grown under saline conditions.

show abstract

“…Several authors have shown that, pepper, is sensitive or moderately sensitive, to salinity during different growth stages (Pascale et al, 2003). It has also been shown that salinity caused a decrease in FG% of lettuce seeds (Nasri et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Salt stress induced changes in germination, lipid peroxidation and antioxidant activities in lettuce (Lactuca sativa L.) seedlings

Mahmoudi¹,

Nasri²,

Tarchoune³

et al. 2011

Afr. J. Biotechnol.

Self Cite

View full text Add to dashboard Cite

Seeds of four lettuce (Lactuca sativa L.) genotypes viz., Great Lakes (GL), Paris Island cos, KagranerSommer (KS) and Isadora were assessed for their response to salt at the germination and seedling stages. The germination rate of the four varieties was comparatively studied under 0, 50, 100, 150 and 200 mM sodium chloride (NaCl) treatments. Differential response of genotypes to salt concentration was observed. Final germination percentage (FG%) decreased with increasing salinity in GL, Paris Island cos and Isadora varieties, and was annulated at the highest salt concentration in GL, the most sensitive variety. However, in the less sensitive, KS, FG% was decreased by 60% compared to the control at 200 mM. KS and GL varieties were selected as stress-tolerant and stress-sensitive varieties, respectively, and were used for further characterization. Dry weights (DWs) of radicles and hypocotyls were reduced by NaCl 100 and 150 mM in GL and only at 150 mM NaCl in KS. The activities of several antioxidant enzymes during germination were determined. Both varieties had the same malondialdehyde (MDA) content under 100 and 150 mM NaCl. The highest gaiacol peroxidise (GPX) activity was detected in GL seedlings at NaCl 50, 100 and 150 mM, respectively. Catalase (CAT) decreased at 50 and 100 mM NaCl, respecively. Total ascorbate (AsA + DHA) decreased in GL and increased significantly in KS. Our results suggest that tolerance of KS to salt may be due to a better protection mechanism against salinity induced oxidative damage relative to GL variety.

show abstract

Effect of salinity on germination, phytase activity and phytate content in lettuce seedling

Cited by 43 publications

References 35 publications

Reduction of Gibberellin by Low Temperature Disrupts Pollen Development in Rice

Reduction of Gibberellin by Low Temperature Disrupts Pollen Development in Rice

The effect of osmopriming on germination, seedling growth and phosphatase activities of lettuce under saline condition

Salt stress induced changes in germination, lipid peroxidation and antioxidant activities in lettuce (Lactuca sativa L.) seedlings

Contact Info

Product

Resources

About