Over-expression of DREB46 enhances drought tolerance in Populus trichocarpa.

The drought responsive element binding (DREB) gene family has a significant role in plant abiotic stress responses. Here, we cloned a drought-inducible DREB gene, DREB46 (Potri.019G075500), and investigated its function in drought tolerance in Populus trichocarpa.

Genome-wide identification of WD40 superfamily in Cerasus humilis and functional characteristics of ChTTG1.

The WD40 superfamily plays an important role in a wide range of developmental and physiological processes. It is a large gene family in eukaryotes. Unfortunately, the research on the WD40 superfamily genes in Cerasus humilis has not been reported.

Overexpression of improves the tolerance of Arabidopsis to salt stress.

Alternative oxidase (AOX) has a well-established involvement in plant growth and stress tolerance in many studies. In this study, we isolated and characterized the AOX2 from . The Open Reading Frame (ORF) contains 1029 nucleotides and encodes 342 amino acid residues.

Ectopic expression of the transcription factor CUC2 restricts growth by cell cycle inhibition in leaves.

Plant leaf margins produce small outgrowths or teeth causing serration in a regular arrangement, which is specified by auxin maxima. In , the spatiotemporal pattern of auxin dependents on both, the transcription factor CUC2 and the signal peptide EPFL2, a ligand of the growth-promoting receptor kinase ERECTA (ER). Ectopic expression of can have contrary effects on leaf growth.

Overexpression of the gene, encoding a violaxanthin de-epoxidase, improves tolerance to drought and salt stress in transgenic Arabidopsis.

To investigate the protective mechanism of violaxanthin de-epoxidase (VDE) zeaxanthin in under drought and salt-stress conditions, we cloned the entire cDNA sequence of from and generated -overexpression (OE) and -complementation (CE) Arabidopsis plants. The open reading frame of contained 1,446 bp nucleotides and encoded 481 amino acids. The ChVDE showed the highest similarity with those of and .

Drought Tolerance Is Correlated with the Activity of Antioxidant Enzymes in Cerasus humilis Seedlings.

Cerasus humilis, grown in the northern areas of China, may experience water deficit during their life cycle, which induces oxidative stress. Our present study was conducted to evaluate the role of oxidative stress management in the leaves of two C. humilis genotypes, HR (drought resistant) and ND4 (drought susceptible), when subjected to a long-term soil drought (WS).

Effects of cucumber mosaic virus infection on electron transport and antioxidant system in chloroplasts and mitochondria of cucumber and tomato leaves.

We examined the responses of the photosynthetic and respiratory electron transport and antioxidant systems in cell organelles of cucumber (Cucumis sativus L.) and tomato (Lycopersicon esculentum Mill.) leaves to infection of cucumber mosaic virus (CMV) by comparing the gas exchange, Chl fluorescence, respiratory electron transport, superoxide dismutase (SOD, EC 1.

Response of ascorbate peroxidase isoenzymes and ascorbate regeneration system to abiotic stresses in Cucumis sativus L.

Ascorbate peroxidase (APX) isoenzymes, distributing in at least four distinct cell compartments, the chloroplastic stroma (sAPX) and thylakoid membrane (tAPX), microbody (mAPX) and cytosol (cAPX), catalyze the reduction of H(2)O(2) to water by using ascorbic acid (AsA) as specific electron donor. In order to better clarify the response of APX isoenzymes and AsA regeneration enzymes to abiotic stresses, the activities of APX isoenzymes as well as monodehydroascorbate reductase (MDAR), glutathione reductase (GR) and dehydroascorbate reductase (DHAR) were investigated in cucumber plants after heat, methyl viologen (MV) and H(2)O(2) treatments. The activities of cAPX, sAPX, mAPX increased after a slight decline throughout the experiment.

Genotypic variation of Rubisco expression, photosynthetic electron flow and antioxidant metabolism in the chloroplasts of chill-exposed cucumber plants.

Genetic improvement of agronomic crops is necessary to cope with chilling stress. To identify the physiological factors responsible for this genotypic difference in chill-induced inhibition of photosynthesis, leaf CO2 assimilation, the electron flux in the chloroplast and the antioxidant metabolism in isolated chloroplasts were examined in two genotypes of cucumber (Cucumis sativus) plants with distinct chilling tolerance. Cucumber plants were exposed to 100 micromol m(-2) s(-1) at 9/7 degrees C (day/night) for 10 d and were then returned to optimal conditions for 2 d.