Influence of dehydration rate on cell sucrose and water relations parameters in an inducible desiccation tolerant aquatic bryophyte

Carvalho, Ricardo Cruz de; Silva, Anabela Bernardes da; Branquinho, Cristina; Silva, Jorge Marques da

doi:10.1016/j.envexpbot.2015.07.002

Cited by 27 publications

(18 citation statements)

References 30 publications

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“…It has also been observed that amphiphilic substances like phenolic compounds relocate from the aqueous cytoplasm to the membranes as lower water contents are reached, acting as strong antioxidants and stabilizing membranes (Beckett and Minibayeva ). It seems that despite the high ROS production observed previously in fast dehydration (Cruz de Carvalho et al ), the high concentration of phenolic compounds that we measured in F. antipyretica may prevent significant lipid peroxidation but not avoid membrane leakage and prevent cell death (Cruz de Carvalho et al ). This fact may be due to the impairment of membrane protection mechanisms, such as protein synthesis (e.g.…”

Section: Discussionmentioning

confidence: 56%

“…Recently, work with Fontinalis antipyretica (Cruz de Carvalho et al , , , ), an aquatic bryophyte with a wide distribution in the Northern hemisphere, allowed further analysis of the importance of dehydration rate in DT mechanisms. This species had been previously classified as desiccation intolerant solely based in electrolyte leakage (Brown and Buck ).…”

Section: Introductionmentioning

confidence: 99%

“…On the other hand, fast drying would induce an increase in ROS, leading to low cell survival (Cruz de Carvalho et al ). Slow drying allowed the bryophyte to induce protein synthesis for protection and repair mechanisms (Cruz de Carvalho et al ), as well as osmoregulation, sucrose accumulation and changes in cell wall elasticity (Cruz de Carvalho et al ).…”

Section: Introductionmentioning

confidence: 99%

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Dehydration rate determines the degree of membrane damage and desiccation tolerance in bryophytes

Carvalho

Catalá

Branquinho

et al. 2016

Physiologia Plantarum

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Desiccation tolerant (DT) organisms are able to withstand an extended loss of body water and rapidly resume metabolism upon rehydration. This ability, however, is strongly dependent on a slow dehydration rate. Fast dehydration affects membrane integrity leading to intracellular solute leakage upon rehydration and thereby impairs metabolism recovery. We test the hypothesis that the increased cell membrane damage and membrane permeability observed under fast dehydration, compared with slow dehydration, is related to an increase in lipid peroxidation. Our results reject this hypothesis because following rehydration lipid peroxidation remains unaltered, a fact that could be due to the high increase of NO upon rehydration. However, in fast-dried samples we found a strong signal of red autofluorescence upon rehydration, which correlates with an increase in ROS production and with membrane leakage, particularly the case of phenolics. This could be used as a bioindicator of oxidative stress and membrane damage.

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Section: Discussionmentioning

confidence: 56%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Dehydration rate determines the degree of membrane damage and desiccation tolerance in bryophytes

Carvalho

Catalá

Branquinho

et al. 2016

Physiologia Plantarum

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“…conditions typically result in overproduction of reactive oxygen species (ROS) and lipid peroxidation in plants(Deeba et al, 2012). Proline, soluble sugar, and soluble proteins are osmolytes, which often accumulate in plants upon exposure to osmotic stress(Ahmad et al, 2016;Cruz de Carvalho, Bernades da Silva, Branquinho, & Marques da Silva, 2015;Cruz de Carvalho et al, 2014;Mittal, Kumari, & Sharma, 2012;Nagao et al, 2005), and our results show that the stresses also led to their accumulation in the mosses. Although there has been reported that the membrane damage ofFontinalis antipyretica by dehydration is due to nitric oxide end products rather than MDA (Cruz de Carvalho, Catalá, Branquinho, Marques da Silva, & Barreno, 2017), we have found significant increase in MDA in H. plumaeforme and P. cirratum upon exposure to water stress (Liu, Lei, Jin, et al, 2015).…”

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confidence: 99%

Evidence of stress imprinting with population‐level differences in two moss species

Liu

et al. 2019

Ecology and Evolution

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Plants are often repeatedly exposed to stresses during their lives and have a mechanism called stress imprinting that provides “memories” of stresses they experience and increases their ability to cope with later stresses. To test hypotheses that primed bryophytes can preserve their stress imprinting after 6 days of recovery and induce higher levels of osmolytes and ROS‐scavenging activities upon later stress exposure, and there exist population‐level differentiation in their desiccation defenses, we transplanted samples of two populations of each of two moss species, Hypnum plumaeforme and Pogonatum cirratum, in a nature reserve in southern China. After 16 months of acclimation, sets of each population were subjected to control, one‐time desiccation stress, duplicated desiccation stress and cross‐stress (low temperature stress followed by desiccation stress) treatments. Levels of oxidant enzymes, osmolytes, and phytohormones in the samples were then determined. The desiccation stress generally led to increases in activities or contents of superoxide dismutase, guaiacol peroxidase, catalase, proline, soluble sugars, soluble proteins, and stress hormones including abscisic acid (ABA), jasmonates (JA), and salicylic acid (SA), with differences between both species and populations. After a 6‐day recovery period, contents of phytohormones (including ABA, JA, SA, and cytokinins) in stressed H. plumaeforme had substantially fallen toward control levels. The duplicated and cross‐stress treatments generally led to further accumulation of proline, soluble sugars, and soluble proteins, with further increases in activities of antioxidant enzymes in some cases. Furthermore, significant differences between allochthonous and native populations were found in contents of malondialdehyde and osmolytes, as well as antioxidant enzyme activities. Our results confirm the hypotheses and highlight the importance of osmolytes in mosses' stress responses.

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“…One leaf disc (Ø 12 mm) was stored at -80 ºC and used, later, to quantify the amount of soluble sugars. These were extracted from the leaf disc using 80% ethanol at 80 ºC and then quantified through changes in absorbance at 405 nm, for sucrose (de Carvalho et al 2015), and 490 nm for glucose and fructose (Santos et al 2017).…”

Section: Plant Performancementioning

confidence: 99%

Effect of cadmium accumulation on the performance of plants and of herbivores that cope differently with organic defences

Godinho¹,

Serrano²,

Silva³

et al. 2018

Preprint

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Some plants can accumulate in their shoots metals that are toxic to most other organisms. This ability may serve as a defence against herbivores. Although both metal accumulation and the production of organic defences may be costly to the plant, the two mechanisms may interact on their effect on herbivores. However, this interplay between metal-based and 'classical' organic defences remains overlooked.Additionally, we show that the induction and suppression of plant defences by spider mites was not affected by Cd supply to the plants. Furthermore, the effect of metal supply on spidermite performance was not affected by previous infestation. Together, our results suggest no interaction between metal-based and organic plant defences, on our system. This may be useful for plants living in heterogeneous environments, as they may use one or the other defence mechanism, depending on their relative performance in each environment. This may be relevant to studies on the interactions between herbivores and plants, from physiology to ecology.

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Influence of dehydration rate on cell sucrose and water relations parameters in an inducible desiccation tolerant aquatic bryophyte

Cited by 27 publications

References 30 publications

Dehydration rate determines the degree of membrane damage and desiccation tolerance in bryophytes

Dehydration rate determines the degree of membrane damage and desiccation tolerance in bryophytes

Evidence of stress imprinting with population‐level differences in two moss species

Effect of cadmium accumulation on the performance of plants and of herbivores that cope differently with organic defences

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