Effects of exogenous abscisic acid on foliar anthocyanin accumulation and drought tolerance in purple rice
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Parinyaphorn Ploenlap
Abstract
The effects of drought and exogenous ABA on foliar anthocyanin accumulation and its role in drought tolerance were studied in two purple rice cultivars GS. No. 00621 and GS. No. 21427. The seedlings were grown for 14 days and separated into four groups including control (well-watered), drought (withholding water), ABA (foliar sprayed with 20 mg L−1 ABA and well-watered), ABA and drought (foliar sprayed with 20 mg L−1 ABA and withholding water). Drought was imposed by withholding water for 7 days. The results showed that drought significantly reduced root and shoot growth in GS. No. 00621, while had little effect on GS. No. 21427. Drought stress also induced anthocyanin overaccumulation in GS. No. 21427, whereas its content was reduced in GS. No. 00621. Exogenous ABA had no effect on anthocyanin in both wellwatered and drought conditions in both cultivars. Higher anthocyanin in GS. No. 21427 was coincided with higher DPPH scavenging ability, antioxidant enzyme activities as well as higher relative water content. It is, therefore, concluded that drought-induced anthocyanin overaccumulation may be different between purple rice cultivars and anthocyanin is beneficial for the response to drought stress by protecting plant antioxidant mechanism. Unlike anthocyanin in plant reproductive organs, exogenous ABA has no effect on foliar anthocyanin accumulation in purple rice. It is possible that anthocyanin accumulation in leaf and reproductive organs may be regulated differently or triggered by different mechanisms.
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© 2015 Institute of Botany, Slovak Academy of Sciences
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Articles in the same Issue
- Anoxybacillus sp. AH1, an α-amylase-producing thermophilic bacterium isolated from Dargeçit hot spring
- Purification and characterization of antifungal chitinase from Bacillus safensis MBCU6 and its application for production of chito-oligosaccharides
- Vulnerability of a riparian zone towards invasion by alien plants depends on its structure
- The Paliurus spina-christi dominated vegetation in Europe
- Reciprocal contamination by invasive plants: analysis of trade exchange between Slovakia and Romania
- Agrobacterium-mediated transformation of chitinase gene from the actinorhizal tree Casuarina equisetifolia in Nicotiana tabacum
- Effects of exogenous abscisic acid on foliar anthocyanin accumulation and drought tolerance in purple rice
- Role of sulphur conferring differential tolerance to iron deficiency in Pisum sativum
- A new species of the genus Leptus (Acari: Erythraeidae) ectoparasitic on Acrididae (Insecta: Orthoptera) from Iran
- Thrips (Thysanoptera) associated with two morphological forms of Andean lupin (Lupinus mutabilis)
- Seasonal dynamics and life cycle of Heterotrissocladius marcidus (Diptera: Chironomidae) in high altitude lakes (High Tatra Mts, Slovakia)
- The parasite community of gobiid fishes (Actinopterygii: Gobiidae) from the Lower Volga River region
- External ontogenetic changes of larval structures in Elachistocleis bicolor (Anura: Microhylidae: Gastrophryninae)
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