Antioxidative Machinery for Redox Homeostasis During Abiotic Stress

Amist, Nimisha; Bano, Chanda; Singh, Navneet

doi:10.1002/9781119463665.ch4

Cited by 5 publications

(2 citation statements)

References 142 publications

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“…Moreover, positively selected genes of the C . tibetana genome were enriched in the biological process of cell redox homeostasis, which influences growth and development and plant responses to biotic and abiotic environmental stimuli (Amist et al, 2019). Some positively selected genes were members of gene families that play important roles in basal defence response, stress tolerance and plant growth and development, such as protein IQ‐domain (IQD) (Abel et al, 2013), trehalose‐phosphate synthase (TPS) (Chary et al, 2008), ABC transporter (ABCBs and ABCIs) (Kaneda et al, 2011; Lane et al, 2016), diacylglycerol kinase (DGK) (Foka et al, 2020), oligopeptide transporter (OPT) (Cao et al, 2011), CBL‐interacting protein kinases (CIPKs) (Kim et al, 2003) and heat stress transcription factor (HSF) (Guo et al, 2016).…”

Section: Discussionmentioning

confidence: 99%

Chromosome‐scale genome assembly of Castanopsis tibetana provides a powerful comparative framework to study the evolution and adaptation of Fagaceae trees

Sun

Guo

Zeng

et al. 2021

Molecular Ecology Resources

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Fagaceae species are increasingly used as models to elucidate the process and mechanism of adaptation and speciation by integrating ecology, evolution and genomics. The genus Castanopsis belongs to the family Fagaceae and is mainly distributed across subtropical and tropical Asia. In the present study, we reported the first chromosome‐scale genome assembly of Castanopsis tibetana, a common species of evergreen broadleaved forests in subtropical China. The combination of Nanopore sequencing and Hi‐C technologies enabled a high‐quality genome assembly. The final assembled genome size of C. tibetana was 878.6 Mb (97.6% of the estimated genome size), consisting of 477 contigs with an N50 length of 3.3 Mb. The benchmarking universal single‐copy orthologue (BUSCO) assessment indicated a completeness of 93.0%. Hi‐C scaffolding generated 12 pseudochromosomes, representing 98.7% of the assembled genome. Subsequently, 40,937 protein‐coding genes were predicted and 90.04% of them were functionally annotated. More than 476.9 Mb of repetitive sequences (54.3% of the genome) were identified, and the percentage of the genome covered by TE elements was 39.98%. Comparative genomics analysis revealed that C. tibetana was most closely related to Castanea mollissima and diverged at 18.48 Ma, and that C. tibetana has undergone considerable gene family expansion and contraction. Evidence of positive selection was detected in 53 genes, which showed different arrangement pattern compared to Quercus robur. The chromosome‐scale genome assembly of C. tibetana will expand Fagaceae genome resources across the family and provide a powerful comparative framework to study the adaptation and evolution of Fagaceae trees.

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Section: Discussionmentioning

confidence: 99%

Chromosome‐scale genome assembly of Castanopsis tibetana provides a powerful comparative framework to study the evolution and adaptation of Fagaceae trees

Sun

Guo

Zeng

et al. 2021

Molecular Ecology Resources

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“…The copyright holder for this preprint this version posted November 10, 2021. ; https://doi.org/10.1101/2021.11.10.468097 doi: bioRxiv preprint 14 Superoxide Dismutase (SOD) Superoxide dismutase are the metalloproteins which catalyze the dismutation of superoxide (O 2 -) radicals to molecular oxygen or H 2 O 2 . The SODs are classified into three types according to the metal ion association and important part of cells antioxidant defense system [48]. The H 2 O 2produce during this reaction is catalyzed to water and oxygen by catalases and peroxidases.…”

Section: Peroxidasementioning

confidence: 99%

Alterations in the Antioxidant Metabolites in Cotton Leaf Curl Disease Infected and Healthy Cotton Leaves

Rahman

2021

Preprint

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The upland cotton (Gossypium hirsutum) belongs to the family Malvaceae and cultivated since ancient times in warmer parts of the world. Pakistan is the 4th largest cotton producing country and prominent cotton yarn exporter of the world. Cotton is the major source of natural fiber and significantly contributes to the economy of Pakistan. There are many factors (biotic and abiotic) affecting the cotton yield in Pakistan. The cotton leaf curl disease (CLCuD) is one of the biotic factors and endemic in the most cotton growing areas of the country. The antioxidant enzymes and antioxidant biochemical metabolites play important role during stress. The present study was planned to compare the antioxidant enzymes and metabolites from healthy and CLCuD infected cotton leaves. Antioxidant enzymes activities including catalase, peroxidase and peroxidase were measured through different antioxidant assays and different antioxidant metabolites were also determined. During stress condition antioxidant metabolites serve as signal for the activation of antioxidant enzymes. Present study revealed that antioxidant enzymes were significantly higher in the infected cotton leaves as compared to the healthy cotton leaves. While the amount of antioxidant metabolites like total phenolic contents (TPC) and total flavonoid contents (TFC) were higher in healthy cotton leaves as compared to the infected leaves.

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