Annual Reviews
1040-2519
Cơ quản chủ quản: N/A
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Các bài báo tiêu biểu
ASCORBATE AND GLUTATHIONE: Keeping Active Oxygen Under Control ▪ Abstract To cope with environmental fluctuations and to prevent invasion by pathogens, plant metabolism must be flexible and dynamic. Active oxygen species, whose formation is accelerated under stress conditions, must be rapidly processed if oxidative damage is to be averted. The lifetime of active oxygen species within the cellular environment is determined by the antioxidative system... ...
Tập 49 Số 1 - Trang 249-279 - 1998
THE WATER-WATER CYCLE IN CHLOROPLASTS: Scavenging of Active Oxygens and Dissipation of Excess Photons ▪ Abstract Photoreduction of dioxygen in photosystem I (PSI) of chloroplasts generates superoxide radicals as the primary product. In intact chloroplasts, the superoxide and the hydrogen peroxide produced via the disproportionation of superoxide are so rapidly scavenged at the site of their generation that the active oxygens do not inactivate the PSI complex, the stromal enzymes, or the ... ...
Tập 50 Số 1 - Trang 601-639 - 1999
PLANT COLD ACCLIMATION: Freezing Tolerance Genes and Regulatory Mechanisms▪ Abstract Many plants increase in freezing tolerance upon exposure to low nonfreezing temperatures, a phenomenon known as cold acclimation. In this review, recent advances in determining the nature and function of genes with roles in freezing tolerance and the mechanisms involved in low temperature gene regulation and signal transduction are described. One of the important conclusions to... ...
Tập 50 Số 1 - Trang 571-599 - 1999
THE OXIDATIVE BURST IN PLANT DISEASE RESISTANCE ▪ Abstract Rapid generation of superoxide and accumulation of H2 O2 is a characteristic early feature of the hypersensitive response following perception of pathogen avirulence signals. Emerging data indicate that the oxidative burst reflects activation of a membrane-bound NADPH oxidase closely resembling that operating in activated neutrophils. T... ...
Tập 48 Số 1 - Trang 251-275 - 1997
PHYTOREMEDIATION ▪ Abstract Contaminated soils and waters pose a major environmental and human health problem, which may be partially solved by the emerging phytoremediation technology. This cost-effective plant-based approach to remediation takes advantage of the remarkable ability of plants to concentrate elements and compounds from the environment and to metabolize various molecules in their tissues. ... ...
Tập 49 Số 1 - Trang 643-668 - 1998
REGULATION OF LIGHT HARVESTING IN GREEN PLANTS ▪ Abstract When plants are exposed to light intensities in excess of those that can be utilized in photosynthetic electron transport, nonphotochemical dissipation of excitation energy is induced as a mechanism for photoprotection of photosystem II. The features of this process are reviewed, particularly with respect to the molecular mechanisms involved. It is shown how the dynamic proper... ...
Tập 47 Số 1 - Trang 655-684 - 1996
BIOSYNTHESIS AND ACTION OF JASMONATES IN PLANTS ▪ Abstract Jasmonic acid and its derivatives can modulate aspects of fruit ripening, production of viable pollen, root growth, tendril coiling, and plant resistance to insects and pathogens. Jasmonate activates genes involved in pathogen and insect resistance, and genes encoding vegetative storage proteins, but represses genes encoding proteins involved in photosynthesis. Jasmonic acid i... ...
Tập 48 Số 1 - Trang 355-381 - 1997