Enzymes and Metabolites in Carbohydrate Metabolism of Desiccation Tolerant Plants

Zhang, Qingwei; Song, Xiaomin; Bartels, Dorothea

doi:10.3390/proteomes4040040

Cited by 44 publications

(22 citation statements)

References 99 publications

(128 reference statements)

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“…Sugar accumulation during dehydration is one of the principal characteristics of desiccation tolerant plants and carbohydrate metabolism differs widely across different species [ 60 ]⁠. High levels of trehalose in hydrated and dehydrated tissues have been reported in several species of the Selaginella genus, including sensitive species [ 13 , 61 – 63 ]⁠.…”

Section: Discussionmentioning

confidence: 99%

Comparative transcriptome analysis suggests convergent evolution of desiccation tolerance in Selaginella species

et al. 2020

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Background Desiccation tolerant Selaginella species evolved to survive extreme environmental conditions. Studies to determine the mechanisms involved in the acquisition of desiccation tolerance (DT) have focused on only a few Selaginella species. Due to the large diversity in morphology and the wide range of responses to desiccation within the genus, the understanding of the molecular basis of DT in Selaginella species is still limited. Results Here we present a reference transcriptome for the desiccation tolerant species S. sellowii and the desiccation sensitive species S. denticulata. The analysis also included transcriptome data for the well-studied S. lepidophylla (desiccation tolerant), in order to identify DT mechanisms that are independent of morphological adaptations. We used a comparative approach to discriminate between DT responses and the common water loss response in Selaginella species. Predicted proteomes show strong homology, but most of the desiccation responsive genes differ between species. Despite such differences, functional analysis revealed that tolerant species with different morphologies employ similar mechanisms to survive desiccation. Significant functions involved in DT and shared by both tolerant species included induction of antioxidant systems, amino acid and secondary metabolism, whereas species-specific responses included cell wall modification and carbohydrate metabolism. Conclusions Reference transcriptomes generated in this work represent a valuable resource to study Selaginella biology and plant evolution in relation to DT. Our results provide evidence of convergent evolution of S. sellowii and S. lepidophylla due to the different gene sets that underwent selection to acquire DT

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Section: Discussionmentioning

confidence: 99%

Comparative transcriptome analysis suggests convergent evolution of desiccation tolerance in Selaginella species

et al. 2020

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“…This result may reflect that different anhydrobiotic species adopt different biochemical strategies and/or molecular programs to promote desiccation tolerance. For example, although many anhydrobiotic animals accumulate trehalose during desiccation, bdelloid rotifers do not ( Lapinski and Tunnacliffe, 2003 ), while plants often accumulate sucrose ( Zhang et al , 2016 ). Moreover, P. superbus is a fast strategist ( i.e.…”

Section: Discussionmentioning

confidence: 99%

Multiple genes contribute to anhydrobiosis (tolerance to extreme desiccation) in the nematode Panagrolaimus superbus

et al. 2017

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The molecular basis of anhydrobiosis, the state of suspended animation entered by some species during extreme desiccation, is still poorly understood despite a number of transcriptome and proteome studies. We therefore conducted functional screening by RNA interference (RNAi) for genes involved in anhydrobiosis in the holo-anhydrobiotic nematode Panagrolaimus superbus. A new method of survival analysis, based on staining, and proof-of-principle RNAi experiments confirmed a role for genes involved in oxidative stress tolerance, while a novel medium-scale RNAi workflow identified a further 40 anhydrobiosis-associated genes, including several involved in proteostasis, DNA repair and signal transduction pathways. This suggests that multiple genes contribute to anhydrobiosis in P. superbus.

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“…An important role for the carbohydrate trehalose in drought tolerance has been confirmed for these plants. This illustrates that nature provides different strategies to survive periods of water shortage and, although the role of fructans in abiotic stress tolerance should not be underestimated, we must also be cautious not to overestimate their importance (Dinakar & Bartels, ; Zhang, Song, & Bartels, ). Of course, the same reasoning holds true for the microbial world.…”

Section: Fructans In Plantsmentioning

confidence: 99%

The fructan syndrome: Evolutionary aspects and common themes among plants and microbes

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Öner

et al. 2017

Plant Cell & Environment

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Fructans are multifunctional fructose-based water soluble carbohydrates found in all biological kingdoms but not in animals. Most research has focused on plant and microbial fructans and has received a growing interest because of their practical applications. Nevertheless, the origin of fructan production, the so-called "fructan syndrome," is still unknown. Why fructans only occur in a limited number of plant and microbial species remains unclear. In this review, we provide an overview of plant and microbial fructan research with a focus on fructans as an adaptation to the environment and their role in (a)biotic stress tolerance. The taxonomical and biogeographical distribution of fructans in both kingdoms is discussed and linked (where possible) to environmental factors. Overall, the fructan syndrome may be related to water scarcity and differences in physicochemical properties, for instance, water retaining characteristics, at least partially explain why different fructan types with different branching levels are found in different species.Although a close correlation between environmental stresses and fructan production is quite clear in plants, this link seems to be missing in microbes. We hypothesize that this can be at least partially explained by differential evolutionary timeframes for plants and microbes, combined with potential redundancy effects.

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Enzymes and Metabolites in Carbohydrate Metabolism of Desiccation Tolerant Plants

Cited by 44 publications

References 99 publications

Comparative transcriptome analysis suggests convergent evolution of desiccation tolerance in Selaginella species

Comparative transcriptome analysis suggests convergent evolution of desiccation tolerance in Selaginella species

Multiple genes contribute to anhydrobiosis (tolerance to extreme desiccation) in the nematode Panagrolaimus superbus

The fructan syndrome: Evolutionary aspects and common themes among plants and microbes

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