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Effects of exogenous spermine on chlorophyll fluorescence, antioxidant system and ultrastructure of chloroplasts in Cucumis sativus L. under salt stress.
Melatonin alleviates heat-induced damage of tomato seedlings by balancing redox homeostasis and modulating polyamine and nitric oxide biosynthesis
Under heat stress, exogenous melatonin increased endogenous NO content along with nitrate reductase- and NO synthase-related activities, and expression of their related genes were also elevated, and melatonin-pretreated seedlings had further increased PAs levels and upregulated transcript abundance, which coincided with suppression of catabolic-related genes expression.
Effects of salt stress on the structure and function of the photosynthetic apparatus in Cucumis sativus and its protection by exogenous putrescine.
- S. Shu, Shi-rong Guo, Jin Sun, L. Yuan
- Biology, MedicinePhysiologia Plantarum : An International Journal…
- 1 November 2012
PAs in chloroplasts play crucial roles in protecting the thylakoid membranes against the deleterious influences of salt stress, and the present results point to the probability that the salt-induced dysfunction of photosynthesis is largely attributable to the loss of PAs.
Melatonin alleviates nickel phytotoxicity by improving photosynthesis, secondary metabolism and oxidative stress tolerance in tomato seedlings.
Exogenous Spermidine Alleviates the Oxidative Damage in Cucumber Seedlings Subjected to High Temperatures
F foliar spray with Spd effectively improved the total antioxidant ability of cucumber seedlings and, therefore, enhanced the tolerance of the plants to high-temperature stress.
Effects of proline on photosynthesis, root reactive oxygen species (ROS) metabolism in two melon cultivars ( Cucumis melo L.) under NaCl stress
Proline treatment enhanced the salinity tolerance of both melon plants and alleviated their salinity-induced damage, suggesting that proline had different effects on different cultivars ofmelon plants.
Effects of exogenous spermidine on photosynthesis, xanthophyll cycle and endogenous polyamines in cucumber seedlings exposed to salinity
It is concluded that Spd can alleviate salt-induced damage on cucumber seedlings by regulating the levels of endogenous polyamines, which was associated with an improvement in the photochemical efficiency of PSII of the salt stressed plants.
The role of 24-epibrassinolide in the regulation of photosynthetic characteristics and nitrogen metabolism of tomato seedlings under a combined low temperature and weak light stress.
Effects of 24-epibrassinolide on the photosynthetic characteristics, antioxidant system, and chloroplast ultrastructure in Cucumis sativus L. under Ca(NO3)2 stress
- L. Yuan, S. Shu, Jin Sun, Shi-rong Guo, T. Tezuka
- Biology, MedicinePhotosynthesis Research
- 4 August 2012
Microscopic analyses revealed that Ca(NO3)2 affected the structure of the photosynthetic apparatus and membrane system and induced damage of granal thylakoid layers, while EBL recovered the typical shape of chloroplasts and promoted the formation of grana.
Effects of exogenous putrescine on glycolysis and Krebs cycle metabolism in cucumber leaves subjected to salt stress
Exogenous putrescine reversed the salt stress and increased gene expression and, in turn, the key enzymes involved in the glycolysis pathway and Krebs cycle, which significantly increased the amounts of organic acids and pyruvate produced, promoting the release of more energy currency (ATP and ADP).