Non-irrigated crops in temperate climates and irrigated crops in arid climates are subjected to continuous cycles of water stress and re-watering. Thus, fast and efficient recovery from water stress may be among the key determinants of plant drought adaptation. The present study was designed to comparatively analyze the roles of drought resistance and drought recovery in drought adaptation and ...

We investigated how the presence of cadmium (Cd) at the emergence of Phragmites australis Trin. (Cav.) ex Steudel plants from rhizomes interacted with leaf and chloroplast physiological and biochemical processes. About 8.5 nmol Cd mg-1 chlorophyll was found in leaves, and 0.83 nmol Cd mg-1 chlorophyll was found in chloroplasts of plants treated with 50 microm Cd. As a result, a 30% loss of chlo...

Coral bleaching events have become more frequent and widespread, largely due to elevated sea surface temperatures. Global climate change could lead to increased variability of sea surface temperatures, through influences on climate systems, e.g. El Niño Southern Oscillation (ENSO). Field observations in 1999, following a strong ENSO, revealed that corals bleached in winter after unusually cold ...

Soil salinization requires developing genetically salt-tolerant and high-yielding genotypes, especially in semi-arid arid regions. In this study, two new Tunisian durum wheat cultivars, INRAT100 Dhahbi, were tested for the first time a semi-closed environment against salinity (0, 6 12 dS m-1). Dry weight of aerial root parts, plant height, number tillers per plant, spike awn length, grain yield...

The geographical distribution of organisms, such as the foundation kelp species Saccharina latissima, is mainly driven by temperature. Globally increasing sea surface temperature and further intensification marine heatwaves have already resulted in local extinction populations worldwide. In present study, we investigated temporal variation thermal susceptibility S. latissima assessing stress re...

The high temperature stress-induced changes in chlorophyll a fluorescence parameters were used to study heat tolerance in nine accessions of common bean (Phaseolus vulgaris L.) received from the germplasm collection of “Maritsa” Vegetable Crops Research Institute and the Invstitute for Introduction and Plant Genetic Resources. The bean plants were treated for 2h at two temperatures, 23oC and 45...

Plant growth promoting rhizobacteria (PGPR) can improve the growth, productivity and tolerance of plants under stress conditions. The aim this study was to investigate effect PGPRs on physiological traits related photosynthesis, canopy temperature (CT) yield tomato hybrids water scarcity in open field Seedlings H-1015 UG 812J F1 were treated by B1, B2, B3 bacteria strains before planting, then ...

Susceptibility to photoinhibition of the evergreen conifers Abies alba Mill., Picea abies (L.) Karst. and Pinus mugo Turra was investigated in an unheated greenhouse during winter and spring 2003. Photosynthetic performance of the seedlings was assessed by chlorophyll a fluorescence and analyses of chlorophyll and total carotenoid concentrations in needles. During winter months, maximum quantum...

BACKGROUND Fermentative production of lactic acid from algae-based carbohydrates devoid of lignin has attracted great attention for its potential as a suitable alternative substrate compared to lignocellulosic biomass. RESULTS A Chlorella sp. GD mutant with enhanced thermo-tolerance was obtained by mutagenesis using N-methyl-N'-nitro-N-nitrosoguanidine to overcome outdoor high-temperature inh...

Under high nutrient concentrations and sufficient light conditions, large phytoplankton may display higher photosynthetic efficiency than smaller cells. This is unexpected since smaller phytoplankton, because of their higher surface to volume ratio, possess a greater ability to take up nutrients and absorb light. In order to investigate the causes of the increased photosynthetic efficiency in l...