Role of calcium in the mitigation of heat stress in the cyanobacterium Anabaena PCC 7120

Tiwari, Anupam; Singh, Priyanka; Asthana, Ravi Kumar

doi:10.1016/j.jplph.2016.05.012

Cited by 18 publications

(9 citation statements)

References 47 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“… Uchida et al (2002) found that suitable concentration of NO restored the chlorophyll levels in rice leaves and protected photosystem II (PSII) to maintain a relatively high activity under salt and heat stresses. Also, Silveira et al (2016) indicated that exogenous NO might improve photosynthesis under water deficit and Tiwari et al (2016) noticed that Ca 2+ application alleviated the reduction of chl a under heat stress. The application of CaCl 2 enhanced photosynthesis by increasing the contents of chl a, chl b, and chl (a + b) in Zoysia japonica under drought stress ( Xu et al, 2013 ).…”

Section: Discussionmentioning

confidence: 99%

Calcium and Calmodulin Are Involved in Nitric Oxide-Induced Adventitious Rooting of Cucumber under Simulated Osmotic Stress

Niu

Liao

et al. 2017

Front. Plant Sci.

View full text Add to dashboard Cite

Osmotic stress is a major form of abiotic stress that adversely affects growth and development of plants and subsequently reduces yield and quality of crops. In this study, the effect of nitric oxide (NO) and calcium (Ca2+) on the process of adventitious rooting in cucumber (Cucumis sativus L.) under simulated osmotic stress was investigated. The results revealed that the effect of exogenous NO and Ca2+ in promoting the development of adventitious roots in cucumber seedlings under simulated osmotic stress was dose-dependent, with a maximal biological response at 10 μM NO donor nitroprusside (SNP) or 200 μM Ca2+. The application of Ca2+ chelators or channel inhibitors and calmodulin (CaM) antagonists significantly reversed NO-induced adventitious rooting, implying that endogenous Ca2+/CaM might be involved in NO-induced adventitious rooting under osmotic stress. Moreover, intracellular Ca amount was also increased by NO in cucumber hypocotyls during the development of adventitious roots under osmotic stress. This increase of endogenous Ca2+ was inhibited by NO specific scavenger 2-(4-carboxyphenyl) -4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide potassium salt (cPTIO), nitrate reductase inhibitors tungstate (Na2WO4) and sodium azide (NaN3). This gives an indication that Ca2+ might be a downstream signaling molecule in the adventitious root development by NO under osmotic condition. The results also show that NO or Ca2+ play a positive role in improving plant water status and photosynthetic system by increasing chlorophyll content and photochemical activity in leaves. Furthermore, NO and Ca2+ treatment might alleviate the negative effects of osmotic stress by decreasing membrane damage and reactive oxygen species (ROS) production by enhancing the activities of superoxide dismutase (SOD), catalase (CAT) and ascorbate peroxidase (APX). Therefore, Ca2+/CaM may act as a downstream signaling molecule in NO-induced development of adventitious root under simulated osmotic stress through improving the photosynthetic performance of leaves and activating antioxidative system in plants.

show abstract

Section: Discussionmentioning

confidence: 99%

Calcium and Calmodulin Are Involved in Nitric Oxide-Induced Adventitious Rooting of Cucumber under Simulated Osmotic Stress

Niu

Liao

et al. 2017

Front. Plant Sci.

View full text Add to dashboard Cite

show abstract

“…Elevated Cu, Zn, or Co concentrations result in an elevation of the carotenoid content in Anabaena oryzae ( 52 ). Similarly, Ca supplementation enhances the level of pigments in Anabaena ( 53 , 54 ). Thus, the cellular metal concentrations in I- tonB2 , I- tonB3 , and I- tonB4 were determined by inductively coupled plasma mass spectrometry (ICP-MS) analyses and compared to the wild-type concentrations that were described before ( 39 ) Since SjdR is functionally not related to TonB-dependent transport ( 39 ), this strain was excluded from the further studies.…”

Section: Resultsmentioning

confidence: 99%

Functional Diversity of TonB-Like Proteins in the Heterocyst-Forming Cyanobacterium Anabaena sp. PCC 7120

Schätzle

Arévalo

Fresenborg

et al. 2021

mSphere

View full text Add to dashboard Cite

show abstract

“…2 ) suggest that extracellular calcium influx can prevent cell death, in agreement with previous results showing that exogenous Ca 2+ supplementation improves the tolerance of Anabaena sp. PCC 7120 to heat stress ( Tiwari et al, 2016 ). In Anabaena sp.…”

Section: Discussionmentioning

confidence: 99%

C-ferroptosis is an iron-dependent form of regulated cell death in cyanobacteria

Aguilera

Berdun

Bártoli

et al. 2021

Journal of Cell Biology

View full text Add to dashboard Cite

Ferroptosis is an oxidative and iron-dependent form of regulated cell death (RCD) recently described in eukaryotic organisms like animals, plants, and parasites. Here, we report that a similar process takes place in the photosynthetic prokaryote Synechocystis sp. PCC 6803 in response to heat stress. After a heat shock, Synechocystis sp. PCC 6803 cells undergo a cell death pathway that can be suppressed by the canonical ferroptosis inhibitors, CPX, vitamin E, Fer-1, liproxstatin-1, glutathione (GSH), or ascorbic acid (AsA). Moreover, as described for eukaryotic ferroptosis, this pathway is characterized by an early depletion of the antioxidants GSH and AsA, and by lipid peroxidation. These results indicate that all of the hallmarks described for eukaryotic ferroptosis are conserved in photosynthetic prokaryotes and suggest that ferroptosis might be an ancient cell death program.

show abstract

Role of calcium in the mitigation of heat stress in the cyanobacterium Anabaena PCC 7120

Cited by 18 publications

References 47 publications

Calcium and Calmodulin Are Involved in Nitric Oxide-Induced Adventitious Rooting of Cucumber under Simulated Osmotic Stress

Calcium and Calmodulin Are Involved in Nitric Oxide-Induced Adventitious Rooting of Cucumber under Simulated Osmotic Stress

Functional Diversity of TonB-Like Proteins in the Heterocyst-Forming Cyanobacterium Anabaena sp. PCC 7120

C-ferroptosis is an iron-dependent form of regulated cell death in cyanobacteria

Contact Info

Product

Resources

About