extended abstract background and objectives sugarcane (saccharum officinarum l.) is from poaceae trible and perennial native plant of asia continent warm areas. ratio fv/fm estimates the maximum quantum yield of photosystem ii. under conditions of stress fv/fm decreased, this decreasing is due to low activity of reaction of photosynthesis centers and reducing of proteins that are responsible fo...

To reveal and quantify the interactive effects of drought stresses and elevated CO2 concentration [CO2] on photochemistry efficiency of cucumber seedlings, the portable chlorophyll meter was used to measure the chlorophyll content, and the Imaging-PAM was used to image the chlorophyll fluorescence parameters and rapid light response curves (RLC) of leaves in two adjacent greenhouses. The result...

Nitric oxide (NO) is one of the key elements in the complex signalling pathway leading to stomatal closure by inducing reversible protein phosphorylation and Ca(2+) release from intracellular stores. As photosynthesis in guard cells also contributes to stomatal function, the aim of this study was to explore the potential role of NO as a photosynthetic regulator. This work provides the first des...

This study was conducted in order to the effect of different concentrations lead pollution on photosynthetic characteristics and growth Miscanthus floridulus, reveal its adaptability stress. The differences gas exchange parameters, chlorophyll fluorescence pigment two floridulus populations, one population from Boluo an uncontaminated site, another Dabaoshan, a mine were compared studied throug...

Aristotelia chilensis (Mol.) Stuntz is an evergreen species endemic to Chile. It grows in open areas or under tree canopy, and its leaves emerge early spring summer. The objective of this study was determine changes photosynthetic parameters, total phenol content (TPC), antioxidant activity, anatomy apical basal A. during the year. Photosynthesis performance determined by measuring electron tra...

The effects of cold acclimation of two ecotypes (Antarctic and Andes) of Colobanthus quitensis (Kunth) Bartl. Caryophyllaceae on their photosynthetic characteristics and performance under high light (HL) were compared. Non-acclimated plants of the Antarctic ecotype exhibited a higher (34%) maximal rate of photosynthesis than the Andes ecotype. In cold-acclimated plants the light compensation po...

Sulphurous acid derived from sulfur dioxide (SO2) emission leads to the pollution of irrigation water and inhibition plant growth. The safe concentration threshold NaHSO3 in plants should be clarified promote agricultural production. In this study, Orychophragmus violaceus seedlings were used as experimental materials five concentrations (i.e., 0, 1, 2, 5, 10 mmol·L−1) simultaneously sprayed on...