Exposure of spring wheat (Triticum aestivum) to ozone in open-top chambers. Effects on acyl lipid composition and chlorophyll content of flag leaves
نویسندگان
چکیده
منابع مشابه
Influence of ozone on ribonuclease activity in wheat (Triticum aestivum) leaves.
Ribonucleases (RNases) degrade RNA and exert a major influence on gene expression during development and in response to biotic and abiotic stresses. RNase activity typically increases in response to pathogen attack, wounding and phosphate (P(i)) deficiency. Activity also increases during senescence and other programmed cell death processes. The air pollutant ozone (O(3)) often induces injury an...
متن کاملElevated CO2 provides protection from O3 induced photosynthetic damage and chlorophyll loss in flag leaves of spring wheat (Triticum aestivum L., cv. ‘Minaret’)
Spring wheat (Triticum aestivum L., cv. ‘Minaret’) was grown in open-top chambers and exposed to two CO2 concentrations (ambient and 680 ppmv) and two O3 concentrations (ambient and ambient +50 or +90 ppbv) either from anthesis onwards or for the entire growing season. The aim of the experiment was to test whether elevated CO2 could provide ‘protection’ to the crop against the damaging effects ...
متن کاملEffects of elevated carbon dioxide and ozone on the growth and yield of spring wheat [Triticum aestivum L)
Spring wheat cv. Minaret was grown under three carbon dioxide (C02) and two ozone (O3) concentrations from seedling emergence to maturity in open-top chambers. Under elevated CO2 concentrations, the green leaf area index of the main shoot was increased, largely due to an increase in green leaf area duration. Biomass increased linearly in response to increasing CO2 (ambient, 550 and 680 ppm). At...
متن کاملCORRELATION BETWEEN NITROGEN AND CHLOROPHYLL CONTENT IN WHEAT (Triticum aestivum L.)
Physiological investigations of nitrogen content and relation between nitrogen and chlorophyll content at some wheat cultivars were carried out at the outset of the flowering phase. Dependence of nitrogen content from mineral elements in the soil was established at the same time. Investigations were guided on unfertilized soil and four fertilization variants (N, NPK, NP and NK). The results ind...
متن کاملEffects of different ozone exposure regimes on photosynthesis, assimilates and thousand grain weight in spring wheat
The aim of the study was to compare two ozone exposure patterns with different peak concentrations under equal dose conditions. Spring wheat (Triticum aestivum cv. ‘Nandu’) was ‘pre-cultivated’ under glasshouse conditions and exposed to two different ozone exposure scenarios (A: 1700–0900 h: 20 ppb, 0900–1700 h: 65 ppb; B: 1600–1200 h: 20 ppb, 1200–1600 h: 110 ppb) in large fumigation chambers ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: New Phytologist
سال: 1995
ISSN: 0028-646X,1469-8137
DOI: 10.1111/j.1469-8137.1995.tb05724.x