Molecular Characterization of Arabidopsis and Brassica juncea Cu/Zn-Superoxide Dismutases Reveals Their Regulation of Shoot Regeneration

Lim, Tze Soo; Chitra, Thiruvetipuram Rajam; Tay, Boon Hui; Pua, Eng Chong; Yu, Hao

doi:10.1007/s00344-007-9036-1

Cited by 5 publications

(4 citation statements)

References 45 publications

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“…6). These observations are coherent with several studies on analyses of transcript regulation of CuZnSODs that exhibited at least two-fold differential increment in response to various stresses like salt (Jagadeeswaran et al, 2009;Jithesh et al, 2006;Ma et al, 2010;Qu et al, 2010;Xiaojing, 2009), drought (Davey et al, 2009;Fulda et al, 2011;Liu and Jiang, 2010;Ma et al, 2010), heat (Lim et al, 2008;Rizhsky et al, 2002), cold (Hernández-Nistal et al, 2002) and MV (Chatzidimitriadou et al, 2009;Sunkar et al, 2006). Abiotic stresses cause high photoinhibition due to limited rate of carbon fixation leading to overproduction of superoxide radicals and H 2 O 2 (Foyer and Noctor, 2005).…”

Section: Discussionsupporting

confidence: 86%

Biochemical and molecular analyses of copper–zinc superoxide dismutase from a C4 plant Pennisetum glaucum reveals an adaptive role in response to oxidative stress

Mahanty

Kaul

Pandey

et al. 2012

Gene

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Section: Discussionsupporting

confidence: 86%

Biochemical and molecular analyses of copper–zinc superoxide dismutase from a C4 plant Pennisetum glaucum reveals an adaptive role in response to oxidative stress

Mahanty

Kaul

Pandey

et al. 2012

Gene

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“…The decreased expression of CSD1 under drought conditions implies that some isoforms of CSD respond to other stressors or exhibit tissue-specific responses to stress. In Arabidopsis , CSD1 exhibited the highest expression in stem tissue but lower expression or no change in response to drought stress (e.g., ABA, NaCl, and PEG treatments) [ 78 ]. Therefore, the lower expression of CSD1 under drought conditions observed in this study might suggest the possibility of post-transcriptional regulations of CSD1 expression or distinct responses of different SOD genes in response to stress.…”

Section: Discussionmentioning

confidence: 99%

Physiological and Molecular Modulations to Drought Stress in the Brassica Species

Yoo,

Hwang,

Koh

et al. 2024

IJMS

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Climate change, particularly drought stress, significantly impacts plant growth and development, necessitating the development of resilient crops. This study investigated physiological and molecular modulations to drought stress between diploid parent species and their polyploid progeny in the Brassica species. While no significant phenotypic differences were observed among the six species, drought stress reduced growth parameters by 2.4% and increased oxidative stress markers by 1.4-fold. Drought also triggered the expression of genes related to stress responses and led to the accumulation of specific metabolites. We also conducted the first study of perfluorooctane sulfonic acid (PFOS) levels in leaves as a drought indicator. Lower levels of PFOS accumulation were linked to plants taking in less water under drought conditions. Both diploid and polyploid species responded to drought stress similarly, but there was a wide range of variation in their responses. In particular, responses were less variable in polyploid species than in diploid species. This suggests that their additional genomic components acquired through polyploidy may improve their flexibility to modulate stress responses. Despite the hybrid vigor common in polyploid species, Brassica polyploids demonstrated intermediate responses to drought stress. Overall, this study lays the framework for future omics-level research, including transcriptome and proteomic studies, to deepen our understanding of drought tolerance mechanisms in Brassica species.

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“…Despite it is known for a long time that natural genetic variations may tremendously impact de novo plant regeneration 32 , and the underlying mechanism of this phenomenon has been intensively studied, it has not been elucidated to date 33 . The involvement of diverse proteins, whose genes are differentially expressed in lines with a high capacity for de novo regeneration, has been reported, including ferredoxin-nitrite reductase 34 , superoxide dismutase 35 , DELLA proteins 36 , a leucine-rich repeat receptor-like kinase 20 , thioredoxin 28 or histone modifying enzymes 37 . Different functions of these proteins, and possible involvement of environmental factors on regulation of their expression, implicate a complex nature of the initiation of de novo regeneration, which include a network of hormone signalling and chromatin remodelling, followed by the modulation of gene expression, hormone levels, and redox homeostasis 18 , 20 , 28 , 33 , 37 – 40 .…”

Section: Discussionmentioning

confidence: 99%

Variability in somatic embryo-forming capacity of spinach

Belić

Zdravković-Korać

Uzelac

et al. 2020

Sci Rep

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High variability in somatic embryo (SE)-forming capacity has previously been observed in several spinach cultivars. Such variability frequently accounted for more variation in embryogenic response of the explants than the factor being investigated. Hence, the variability in embryogenic capacity was examined in the present study at both the population and the single-seedling level, using seeds of spinach cultivar Matador obtained from nine European seed companies. Seed population obtained from Slovenia (Sl) was superior to others, with the highest regeneration frequency (100%) and the highest mean SE number (14.4). A total of 82% of these seedlings had 80–100% of regenerating explants, while in populations with intermediate embryogenic capacity approximately 40% of seedlings had 20–60% of regenerating explants. The explants from the majority of seedlings (52–100%) in the least responsive populations were irresponsive. Furthermore, the explants from Sl seedlings regenerated from 10–20 (43.5%) up to > 20 (27.6%) SEs on average, while the explants from the majority of seedlings belonging to other populations regenerated 1–10 SEs. The present study strongly indicates that the variability of plant material must not be overlooked, because choosing more responsive individuals for one treatment and less responsive ones for another may lead to misinterpretation of the data.

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Molecular Characterization of Arabidopsis and Brassica juncea Cu/Zn-Superoxide Dismutases Reveals Their Regulation of Shoot Regeneration

Cited by 5 publications

References 45 publications

Biochemical and molecular analyses of copper–zinc superoxide dismutase from a C4 plant Pennisetum glaucum reveals an adaptive role in response to oxidative stress

Biochemical and molecular analyses of copper–zinc superoxide dismutase from a C4 plant Pennisetum glaucum reveals an adaptive role in response to oxidative stress

Physiological and Molecular Modulations to Drought Stress in the Brassica Species

Variability in somatic embryo-forming capacity of spinach

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