Antioxidant defense system in young olive plants against drought stress and mitigation of adverse effects through external application of alleviating products

Denaxa, Nikoleta-Kleio; Damvakaris, Theodoros; Roussos, Peter A.

doi:10.1016/j.scienta.2019.108812

Cited by 60 publications

(35 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Further, ROS scavenging enzymatic antioxidants, such as superoxide dismutase (SOD), peroxidase (POD), catalase (CAT), glutathione reductase (GR), and ascorbate peroxidase (APX) can be activated to clear these excessive ROS (Gill and Tuteja, 2010). Modifications in the activities of these enzymes are likely the primary path in plants for tolerating water stress (Nikoleta-Kleio et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Response of Plants to Water Stress: A Meta-Analysis

et al. 2020

View full text Add to dashboard Cite

Plants are key to the functionality of many ecosystem processes. The duration and intensity of water stress are anticipated to increase in the future; however, a detailed elucidation of the responses of plants to water stress remains incomplete. For this study, we present a meta-analysis derived from the 1,301 paired observations of 84 studies to evaluate the responses of plants to water stress. The results revealed that although water stress inhibited plant growth and photosynthesis, it increased reactive oxygen species (ROS), plasma membrane permeability, enzymatic antioxidants, and non-enzymatic antioxidants. Importantly, these responses generally increased with the intensity and duration of water stress, with a more pronounced decrease in ROS anticipated over time. Our findings suggested that the overproduction of ROS was the primary mechanism behind the responses of plants to water stress, where plants appeared to acclimatize to water stress, to some extent, over time. Our synthesis provides a framework for better understanding the responses and mechanisms of plants under drought conditions.

show abstract

Section: Introductionmentioning

confidence: 99%

Response of Plants to Water Stress: A Meta-Analysis

et al. 2020

View full text Add to dashboard Cite

show abstract

“…Similar results were observed in Handeliodendron bodinieri (Levl.) (Leng et al 2020), Olea europaea L (Denaxa et al 2020). We also found that the SOD activity increased signi cantly at day 6.…”

Section: Antioxidant Enzyme Activities and Mdamentioning

confidence: 99%

Effects of drought stress and rehydration on physiological and biochemical of four oak species in China

Xiong

Wang

Chen

et al. 2021

Preprint

View full text Add to dashboard Cite

Background: Quercus fabri Hance, Quercus serrata Thunb, Quercus acutissima Carruth, and Quercus variabilis BL are four Chinese oak species commonly used for forestation. In recent years, with the global warming caused by the greenhouse effect, seedlings in mountainous areas after afforestation often suffer seasonal drought stress, which seriously affects their survival and growth. In order to ensure the survival of seedlings, we need to select oak species with strong drought resistance. Therefore, we first need to understand the differences in drought resistance of the four oak tree species at the seedling stage, and comprehensively evaluate their drought resistance capabilities by studying the changes in the physiological and biochemical characteristics of the seedlings under continuous drought and rehydration conditions.Methods: The four oak seedlings were divided into drought-rewatering treatment group and normal watering control group. For the seedlings of the drought-rewatering treatment group, drought stress lasting 31 days was used, and then re-watering and recovering for 5 days. The water parameters, osmotic adjustment substance content, antioxidant enzyme activity and photosynthesis parameters of the seedlings in the two groups were measured every 5 days. Principal component analysis, correlation analysis and membership function were used to analyze the physiological and biochemical characteristics of the seedlings of the four oak in two groups.Results and conclusions: Compared with the control group, the relative water content, water potential, net photosynthetic rate, transpiration rate, and stomatal conductance levels of the four oaks all showed a downward trend under continuous drought stress, and showed an upward trend after rehydration. The soluble protein, soluble sugar, proline, peroxidase, superoxide dismutase and catalase content of the four oaks increased first and then decreased under drought stress, and then increased after rehydration. The content of glycine betaine and malondialdehyde continued to increase, and gradually decreased after rehydration. The weight of each index was calculated by PCA, and then the comprehensive evaluation of each index was carried out through the membership function method. The drought resistance levels of the four oak species were as follows: Q. serrata > Q. fabri > Q. variabilis > Q. acutissima.

show abstract

“…Cekaman menghambat proses perkecambahan, mengurangi laju, dan meningkatkan heterogenitas perkecambahan sehingga menurunkan pertumbuhan dan hasil panen (Ansari dan Sharif-Zadeh 2012). Tanaman dapat melindungi diri dari kerusakan sel akibat ROS (radikal bebas) melalui sistem pertahanan antioksidan (Denaxa et al 2020). Namun demikian, antioksidan endogen yang dihasilkan tanaman tidak cukup untuk mengatasi kerusakan akibat ROS (Soundararajan et al 2019), oleh karena itu untuk mitigasi akibat cekaman perlu ditambahkan antioksidan secara eksogen.…”

Section: Pendahuluanunclassified

“…Efek positif dari ekstrak kulit buah naga dalam meningkatkan laju perkecambahan, diduga karena mengandung senyawa bioaktif yang bersifat antioksidan sehingga dapat menangkal dampak dari cekaman oksidatif (Fidrianny et al 2017).…”

Section: Hasil Dan Pembahasanunclassified

“…Pemberian ekstrak kulit buah naga secara bertingkat dari 0 % hingga 1 % meningkatkan panjang akar dari 11,50 cm menjadi 13,99 cm secara nyata. Banyak peneliti yang mendapatkan bukti bahwa kulit buah naga mengandung sejumlah senyawa bioaktif yang bersifat antioksidan (Putri et al 2015;Fidrianny et al 2017), seperti fenolik, vitamin C, betacianin (Jalgaonkar et al 2020), flavonoid (Tsai et al 2019), yang mampu meredam radikal bebas yang berasal dari sel yang mengalami cekaman (Sayuti dan Yenrina 2015), sehingga proses pertumbuhannya tidak mengalami gangguan.…”

Section: Hasil Dan Pembahasanunclassified

See 1 more Smart Citation

Potensi Ekstrak Kulit Buah Naga untuk Mitigasi Cekaman Salinitas pada Perkecambahan Benih Kedelai

Suryaman

Hodiyah

Inten

2020

Agrotechnology Res J

View full text Add to dashboard Cite

Salinity stress has negative effect on seed germination; therefore, it is necessary to find technology to mitigate it. The research was conducted to study the potency of peel extract of dragon fruit to mitigate salinity stress on soybean seed germination. This research used a randomized block design with factorial patterns and three replications. The first factor was the level of salinity of NaCl (C), consisted of 3 levels (c0 = 0%, c1=0.5%, c2=1%), The second factor was peel extract of dragon fruit (I), consisted of 3 levels (i0 = 0% (control), i1 = 1%, and i2=2%). The parameters analyzed were germination percentage, germination rate, root length, epicotyl length, electric conductivity, and dry weight of sprout. The data were analyzed with ANOVA and Duncan’s multiple range test at α = 5 %. The result showed no interaction between salinity stress and peel extract of dragon fruit on soybean seed germination. Salinity stress significantly decreased sprout vigor with the highest decrease was shown at 1% salinity; on contrarily peel extract of dragon fruit could maintain sprout vigor. Peel extract of dragon fruit 2% was the potential to mitigate salinity stress.

show abstract

Antioxidant defense system in young olive plants against drought stress and mitigation of adverse effects through external application of alleviating products

Cited by 60 publications

References 38 publications

Response of Plants to Water Stress: A Meta-Analysis

Response of Plants to Water Stress: A Meta-Analysis

Effects of drought stress and rehydration on physiological and biochemical of four oak species in China

Potensi Ekstrak Kulit Buah Naga untuk Mitigasi Cekaman Salinitas pada Perkecambahan Benih Kedelai

Contact Info

Product

Resources

About