Salinity induction of recycling Crassulacean acid metabolism and salt tolerance in plants of Talinum triangulare

Montero, Estefanía; Francisco, Ana Marta; Montes, Enrique; Herrera, Ana

doi:10.1093/aob/mcy030

Cited by 11 publications

(5 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The genus Portulaca contains the only known example of a C4 plant which can switch to crassulacean acid metabolism (CAM) under drought stress [ 42 , 43 ]. Salinity reduced the gas exchange and induced CAM metabolism, thus conferring higher water-use efficiency in Talinum triangulare [ 44 ].…”

Section: Discussionmentioning

confidence: 99%

Salinity Stress Affects Photosynthesis, Malondialdehyde Formation, and Proline Content in Portulaca oleracea L.

Hniličková

Kraus

Vachová

et al. 2021

Plants

138

View full text Add to dashboard Cite

In this investigation, the effect of salt stress on Portulaca oleracea L. was monitored at salinity levels of 100 and 300 mM NaCl. At a concentration of 100 mM NaCl there was a decrease in stomatal conductance (gs) simultaneously with an increase in CO2 assimilation (A) at the beginning of salt exposure (day 3). However, the leaf water potential (ψw), the substomatal concentration of CO2 (Ci), the maximum quantum yield of photosystem II (Fv/Fm), and the proline and malondialdehyde (MDA) content remained unchanged. Exposure to 300 mM NaCl caused a decrease in gs from day 3 and a decrease in water potential, CO2 assimilation, and Fv/Fm from day 9. There was a large increase in proline content and a significantly higher MDA concentration on days 6 and 9 of salt stress compared to the control group. After 22 days of exposure to 300 mM NaCl, there was a transition from the C4 cycle to crassulacean acid metabolism (CAM), manifested by a rapid increase in substomatal CO2 concentration and negative CO2 assimilation values. These results document the tolerance of P. oleracea to a lower level of salt stress and the possibility of its use in saline localities.

show abstract

Section: Discussionmentioning

confidence: 99%

Salinity Stress Affects Photosynthesis, Malondialdehyde Formation, and Proline Content in Portulaca oleracea L.

Hniličková

Kraus

Vachová

et al. 2021

Plants

138

View full text Add to dashboard Cite

show abstract

“…2). Nocturnal titratable acidity of T. triangulare was previously reported to reach 10–30 µmol H + g –1 FW with progressing drought (Brilhaus et al , 2016) and 40–60 µmol H + g –1 FW in salt-induced recycling CAM (Montero et al , 2018). Here, during the first dark period after the ABA treatment, end-of-night titratable acidity reached 52.7±4.1 µmol H + g –1 FW, and the difference in titratable acidity between the early hours of the dark period and the subsequent morning was comparable to that observed by Herrera et al (1991) in sun-exposed leaves after 4 days of water withdrawal.…”

Section: Discussionmentioning

confidence: 98%

Transcript and metabolite changes during the early phase of abscisic acid-mediated induction of crassulacean acid metabolism in Talinum triangulare

Maleckova

Brilhaus

Wrobel

et al. 2019

Journal of Experimental Botany

View full text Add to dashboard Cite

Crassulacean acid metabolism (CAM) has evolved as a water-saving strategy, and its engineering into crops offers an opportunity to improve their water use efficiency. This requires a comprehensive understanding of the regulation of the CAM pathway. Here, we use the facultative CAM species Talinum triangulare as a model in which CAM can be induced rapidly by exogenous abscisic acid. RNA sequencing and metabolite measurements were employed to analyse the changes underlying CAM induction and identify potential CAM regulators. Non-negative matrix factorization followed by k-means clustering identified an early CAM-specific cluster and a late one, which was specific for the early light phase. Enrichment analysis revealed abscisic acid metabolism, WRKY-regulated transcription, sugar and nutrient transport, and protein degradation in these clusters. Activation of the CAM pathway was supported by up-regulation of phosphoenolpyruvate carboxylase, cytosolic and chloroplastic malic enzymes, and several transport proteins, as well as by increased end-of-night titratable acidity and malate accumulation. The transcription factors HSFA2, NF-YA9, and JMJ27 were identified as candidate regulators of CAM induction. With this study we promote the model species T. triangulare, in which CAM can be induced in a controlled way, enabling further deciphering of CAM regulation.

show abstract

“…In this species, Na + seems to be fundamental for the regeneration of phosphoenolpyruvate, the substrate for initial carboxylation in plants with C 4 and CAM metabolism ( Scholl et al, 2020 ). CAM metabolism is a mechanism that protects against increased salinity, but the most critical tolerance mechanism can be the accumulation of ions in leaf vacuoles for osmotic adjustment ( Montero et al, 2018 ). In halophytes, the accumulation of Na and its compartmentalization in vacuoles modulate the osmotic potential and help guarantee water absorption under salt stress conditions ( Zeng et al, 2015 ).…”

Section: Discussionmentioning

confidence: 99%

Anatomical and physiological responses of Aechmea blanchetiana (Bromeliaceae) induced by silicon and sodium chloride stress during in vitro culture

Cipriano

Martins

Conde

et al. 2023

PeerJ

View full text Add to dashboard Cite

Salt stress is one of the most severe abiotic stresses affecting plant growth and development. The application of silicon (Si) is an alternative that can increase the tolerance of plants to various types of biotic and abiotic stresses. The objective was to evaluate salt stress’s effect in vitro and Si’s mitigation potential on Aechmea blanchetiana plants. For this purpose, plants already established in vitro were transferred to a culture medium with 0 or 14 µM of Si (CaSiO3). After growth for 30 days, a stationary liquid medium containing different concentrations of NaCl (0, 100, 200, or 300 µM) was added to the flasks. Anatomical and physiological analyses were performed after growth for 45 days. The plants cultivated with excess NaCl presented reduced root diameter and effective photochemical quantum yield of photosystem II (PSII) (ΦPSII) and increased non-photochemical dissipation of fluorescence (qN). Plants that grew with the presence of Si also had greater content of photosynthetic pigments and activity of the enzymes of the antioxidant system, as well as higher values of maximum quantum yield of PSII (FV/FM), photochemical dissipation coefficient of fluorescence (qP) and fresh weight bioaccumulation of roots and shoots. The anatomical, physiological and biochemical responses, and growth induced by Si mitigated the effect of salt stress on the A. blanchetiana plants cultivated in vitro, which can be partly explained by the tolerance of this species to grow in sandbank (Restinga) areas.

show abstract

Salinity induction of recycling Crassulacean acid metabolism and salt tolerance in plants of Talinum triangulare

Cited by 11 publications

References 37 publications

Salinity Stress Affects Photosynthesis, Malondialdehyde Formation, and Proline Content in Portulaca oleracea L.

Salinity Stress Affects Photosynthesis, Malondialdehyde Formation, and Proline Content in Portulaca oleracea L.

Transcript and metabolite changes during the early phase of abscisic acid-mediated induction of crassulacean acid metabolism in Talinum triangulare

Anatomical and physiological responses of Aechmea blanchetiana (Bromeliaceae) induced by silicon and sodium chloride stress during in vitro culture

Contact Info

Product

Resources

About