Chloroplast NADPH-thioredoxin reductase interacts with photoperiodic development in Arabidopsis.

Chloroplast NADPH-thioredoxin reductase (NTRC) belongs to the thioredoxin systems that control crucial metabolic and regulatory pathways in plants. Here, by characterization of T-DNA insertion lines of NTRC gene, we uncover a novel connection between chloroplast thiol redox regulation and the control of photoperiodic growth in Arabidopsis (Arabidopsis thaliana). Transcript and metabolite profiling revealed severe developmental and metabolic defects in ntrc plants grown under a short 8-h light period.

Diverse roles for chloroplast stromal and thylakoid-bound ascorbate peroxidases in plant stress responses.

Photosynthetic light reactions comprise a significant source of hydrogen peroxide (H(2)O(2)) in illuminated leaves. APXs (ascorbate peroxidases) reduce H(2)O(2) to water and play an important role in the antioxidant system of plants. In the present study we addressed the significance of chloroplast APXs in stress tolerance and signalling in Arabidopsis thaliana.

Expression of senescence-associated genes in the leaves of silver birch (Betula pendula).

Development was monitored throughout the entire life span of silver birch (Betula pendula Roth.) leaves. The focus was on senescence-related changes in photosynthesis and gene expression.

Contrasting effects of elevated carbon dioxide concentration and temperature on Rubisco activity, chlorophyll fluorescence, needle ultrastructure and secondary metabolites in conifer seedlings.

Scots pine (Pinus sylvestris L.) and Norway spruce (Picea abies (L.) Karst.