Programmed Cell Death as a Response to High Light, UV and Drought Stress in Plants

Wituszyńska, Weronika; Karpiński, Stanisław

doi:10.5772/53127

Cited by 30 publications

(34 citation statements)

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“…6B). ROS directly attack organelles and cause plant cells to suffer oxidative stress, finally causing the PCD of the cell (Wituszyńska and Karpiński 2013). AsA is not only a part of enzymatic antioxidant defense system but also plays an important role in the nonenzymatic antioxidant system, which increased its efficiency and contribution to ROS neutralization and detoxification (Akram et al 2017).…”

Section: Gldh-236oe Has Higher Resistance To Hl Stressmentioning

confidence: 99%

“…Over-absorption of light causes photoinhibition that limits plant photosynthetic activity, development, and productivity (Takahashi and Badger 2011). Under HL conditions, more ROS are produced continuously as by-products of various pathways in chloroplasts and mitochondria if over-absorbed light cannot be dissipated safely (Wituszyńska and Karpiński 2013). When the balance between generation and scavenging of ROS is broken, proteins, lipids, photosynthetic pigments, and other cell component are attacked by ROS, finally leading to functional incapacitation and programmed cell death (PCD) (Petrov et al 2015).…”

Section: Introductionmentioning

confidence: 99%

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Identification of a GLDH-overexpressing Arabidopsis mutant and its responses to high-light stress

Zheng¹,

Zhang²,

Wang³

et al. 2019

Photosynt.

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Ascorbic acid (AsA) is an important antioxidant protecting plant against environmental stresses. L-galactono-1,4-lactone dehydrogenase (GLDH) is a key enzyme in AsA synthesis pathway. To investigate the roles of AsA in mitigating high light (HL) damage, Arabidopsis GLDH mutants SALK_060087 and SALK_008236 with altered GLDH-expression were screened for homozygotes. No homozygotes were identified from SALK_060087, but most individuals of the SALK_008236 line (GLDH-236OE) were GLDH-overexpressing homozygous mutants accumulating more AsA than wild type (WT). An investigation of the physiological responses to HL demonstrated that the chlorophyll fluorescence parameters were significantly higher in GLDH-236OE than that in WT after 14-d HL. The degradation of photosynthetic pigment in WT was more severe than that in GLDH-236OE. GLDH-236OE accumulated more AsA, anthocyanins, flavonoids, and phenolics, while WT accumulated more reactive oxygen species (ROS) during HL. Our results suggest that GLDH-236OE have lesser sensitivity and higher tolerance to HL due to a higher capacity to eliminate ROS, absorb extra light, and dissipate thermal energy. Abbreviations: 2-ODDs -2-oxoglutarate-dependent dioxygenases; ABRC -Arabidopsis Biological Resource Center; APX -ascorbate peroxidase; AsA -L-ascorbic acid; Asc -reduced ascorbic acid; DPPH -1, 1-diphenyl-2-picrylhydrazyl; ETR -electron transport rate; F -corresponding fluorescence; F0 -minimal fluorescence yield of the dark-adapted state; F3H -flavanone 3-hydroxylase; FLS -flavonol synthase; Fm -maximal fluorescence yield of the dark-adapted state; Fm' -maximal fluorescence yield of the light-adapted state; FM -fresh mass; Fv/Fm -maximal quantum yield of PSII

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Section: Gldh-236oe Has Higher Resistance To Hl Stressmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Identification of a GLDH-overexpressing Arabidopsis mutant and its responses to high-light stress

Zheng¹,

Zhang²,

Wang³

et al. 2019

Photosynt.

View full text Add to dashboard Cite

show abstract

“…Plants are continuously exposed to a large variety of biotic and abiotic stresses during their successive stages of development [1][2][3][4]. Living organisms have different endogenous strategies to acclimate to a series of adverse environmental conditions.…”

Section: Commentarymentioning

confidence: 99%

“…Animals can easily move from one place to another to avoid challenging environmental stresses. In contrast, due to immobile nature of plants, they cannot escape from adverse environmental conditions including high light, high temperature, chilling, drought, ultra-violet radiation during their consecutive stages of development [1][2][3][4]. Plants have evolved highly organized strategies to cope with such adverse environmental conditions [4][5][6].…”

Section: Commentarymentioning

confidence: 99%