Rapid starch degradation in the wood of olive trees under heat and drought is permitted by three stress‐specific beta amylases

Tsamir-Rimon, Mor; Ben‐Dor, Shifra; Feldmesser, Ester; Oppenhimer-Shaanan, Yaara; David‐Schwartz, Rakefet; Samach, Alon; Klein, Tamir

doi:10.1111/nph.16907

Cited by 33 publications

(27 citation statements)

References 94 publications

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“…According to studies using transgenic and mutant plants, beta-amylase seems to be important for normal degradation of the transient starch accumulated in chloroplasts [76]. Meanwhile, beta-amylases possibly facilitating the rapid starch degradation under heat and drought [77]. In this study, we found that the PSG expression levels involved in beta-amylase for O. longilobus was signi cantly higher than those for O. taihangensis (Figure 4A).…”

Section: Adaptability Of Psgsmentioning

confidence: 48%

“…In this study, we found that the PSG expression levels involved in beta-amylase for O. longilobus was signi cantly higher than those for O. taihangensis (Figure 4A). Starch degradation as a major response in conditions prohibiting photosynthesis or prolonged drought [77], therefore, O. longilobus seems better adapted to weak light or drought conditions than O. taihangensis.…”

Section: Adaptability Of Psgsmentioning

confidence: 99%

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Adaptation Insights from Comparative Transcriptome Analysis of Two Opisthopappus Species in the Taihang Mountains

Chen

Zhang

Zang

et al. 2021

Preprint

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Opisthopappus is a major wild source of Asteraceae with good cold and drought resistance. Two species of this genus (Opisthopappus taihangensis and Opisthopappus longilobus) have been employed as model systems to address the evolutionary history of perennial herb biomes in the Taihang Mountains of China. However, further studies on the adaptive divergence processes of these two species are currently impeded by the lack of genomic resources. To elucidate the molecular mechanisms involved, a comparative analysis of these two species was conducted. Among the identified transcription factors, the bHLH members were most prevalent, which exhibited significantly different expression levels in the terpenoid metabolic pathway. O. longilobus revealed a higher expression than did O. taihangensis in terms of terpenes biosynthesis and metabolism, particularly regarding monoterpenoids and diterpenoids. Analyses of the positive selection genes (PSGs) identified from O. taihangensis and O. longilobus, 1203 genes were found that related to adaptative divergence, which were under rapid evolution and/or have signs of positive selection. Different PSG expressions occurred primarily in the mitochondrial electron transport, starch degradation, secondary metabolism, as well as nucleotide synthesis and S-metabolism pathway processes. Two PSGs were obviously differentially expressed in terpenes biosynthesis that might result in the fragrances divergence between O. longilobus and O. taihangensis, which would provide insights as to how the two species adapted to different environments, characterized by sub-humid warm temperate and temperate continental monsoon climates. The comparative analysis for these two species of Opisthopappus not only revealed how the divergence occurred from molecular perspective, but also provided novel insights into how differential adaptations occurred in Taihang Mountains.

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Section: Adaptability Of Psgsmentioning

confidence: 48%

Section: Adaptability Of Psgsmentioning

confidence: 99%

Adaptation Insights from Comparative Transcriptome Analysis of Two Opisthopappus Species in the Taihang Mountains

Chen

Zhang

Zang

et al. 2021

Preprint

View full text Add to dashboard Cite

show abstract

“…According to studies using transgenic and mutant plants, beta-amylase seems to be important for normal degradation of the transient starch accumulated in chloroplasts [ 76 ]. Meanwhile, beta-amylases possibly facilitating the rapid starch degradation under heat and drought [ 77 ]. In this study, we found that the PSG expression levels involved in beta-amylase for O. longilobus was significantly higher than those for O. taihangensis (Fig.…”

Section: Discussionmentioning

confidence: 99%

“…5 A). Starch degradation as a major response in conditions prohibiting photosynthesis or prolonged drought [ 77 ], therefore, O. longilobus seems better adapted to weak light or drought conditions than O. taihangensis .…”

Section: Discussionmentioning

confidence: 99%

Adaptation insights from comparative transcriptome analysis of two Opisthopappus species in the Taihang mountains

et al. 2022

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Opisthopappus is a major wild source of Asteraceae with resistance to cold and drought. Two species of this genus (Opisthopappus taihangensis and O. longilobus) have been employed as model systems to address the evolutionary history of perennial herb biomes in the Taihang Mountains of China. However, further studies on the adaptive divergence processes of these two species are currently impeded by the lack of genomic resources. To elucidate the molecular mechanisms involved, a comparative analysis of these two species was conducted. Among the identified transcription factors, the bHLH members were most prevalent, which exhibited significantly different expression levels in the terpenoid metabolic pathway. O. longilobus showed higher level of expression than did O. taihangensis in terms of terpenes biosynthesis and metabolism, particularly monoterpenoids and diterpenoids. Analyses of the positive selection genes (PSGs) identified from O. taihangensis and O. longilobus revealed that 1203 genes were related to adaptative divergence, which were under rapid evolution and/or have signs of positive selection. Differential expressions of PSG occurred primarily in the mitochondrial electron transport, starch degradation, secondary metabolism, as well as nucleotide synthesis and S-metabolism pathway processes. Several PSGs were obviously differentially expressed in terpenes biosynthesis that might result in the fragrances divergence between O. longilobus and O. taihangensis, which would provide insights into adaptation of the two species to different environments that characterized by sub-humid warm temperate and temperate continental monsoon climates. The comparative analysis for these two species in Opisthopappus not only revealed how the divergence occurred from molecular perspective, but also provided novel insights into how differential adaptations occurred in Taihang Mountains.

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“…sylvestris) olive trees provide an effective way of identifying the molecular mechanisms involved in morphogenesis ( Cruz et al, 2016 ; Unver et al, 2017 ; Rao et al, 2021 ). Researches on fruit development, fatty acid synthesis, and response to drought or salt or heat is plentiful ( Rao et al, 2019 ; Tsamir-Rimon et al, 2020 ; Valente et al, 2020 ), but little is known about the response of the olive tree to aluminum stress.…”

Section: Introductionmentioning

confidence: 99%

Comprehensive evaluation of the response to aluminum stress in olive tree (Olea europaea L.)

Niu

Gao

et al. 2022

Front. Plant Sci.

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Olive (Olea europaea L.) is an ancient tree species in the Mediterranean, but the lack of knowledge about aluminum-resistant varieties limits its introduction to acidic soil. The objective of this study was to have a comprehensive evaluation of the response to aluminum stress in olive tree at germplasm, metabolome, and transcriptome levels. In this experiment, seedlings of 97 olive germplasm with 1.0–3.0 cm roots and two leaves were treated with 50 μM Al3+ (pH = 5.0). By factor analysis of the traits of defoliation rate, rooting rate, length of extended root, and length of new root, 97 germplasm were classified into five different groups according to their diverse responses to aluminum stress: 5 highly resistant (5.15%), 30 moderately resistant (30.93%), 31 general (31.96%), 23 moderately sensitive (23.71%), and 8 highly sensitive (8.25%) germplasm. The three most sensitive and three most resistant germplasm were further used for metabolome and transcriptome analysis. Exposed to aluminum stress, 96 differentially accumulated metabolites (DAMs)/4,845 differentially expressed genes (DEGs) and 66 DAMs/2,752 DEGs were identified in highly sensitive and resistant germplasm, respectively. Using multi-omics technology, the pathways and related DAMs/DEGs involved in cell wall/cytoplasm receptors, reactive oxygen species balance, hormone induction, synthesis of organic acids, Al3+ transport, and synthesis of metabolites were identified to mainly regulate the response to aluminum stress in olive. This study provides a theoretical guide and prior germplasm and genes for further genetic improvement of aluminum tolerance in the olive tree.

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Rapid starch degradation in the wood of olive trees under heat and drought is permitted by three stress‐specific beta amylases

Cited by 33 publications

References 94 publications

Adaptation Insights from Comparative Transcriptome Analysis of Two Opisthopappus Species in the Taihang Mountains

Adaptation Insights from Comparative Transcriptome Analysis of Two Opisthopappus Species in the Taihang Mountains

Adaptation insights from comparative transcriptome analysis of two Opisthopappus species in the Taihang mountains

Comprehensive evaluation of the response to aluminum stress in olive tree (Olea europaea L.)

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