Part 1 Photooxidative stresses: creation of photo-tolerant mutants of a cyanobacterium, "synechocystis" sp. PCC 6803 by "in vitro" random mutagenesis of the "psbA" gene, Kimiyuki Satoh; photorespiration is an essential mechanism for the protection of C3 plants from photooxidation, Go Takeba and Akiko Kozaki; molecular mechanism for relaxation of and protection from light stress, Kozi Asada et al; gene structures and expression control of active oxygen scavenging enzymes in rice, Kunisuke Tanaka; photooxidative stress sensitivity of transgenic plants containing altered levels of active oxygen scavenging enxymes, Kiyoshi Tanaka et al. Part 2 High and low temperature stresses: molecular chaperones and temperature stress, Mikio Nishimura; molecular mechanisms of the low-temperature tolerance of the photosynthetic machinery, Morio Murata and Yoshitaka Nishiyama. Part 3 Salt, ionic and drought stresses: glycinebetaine and the genetic engineering of salinity tolerance in plants, Tetsuko Takabe et al; genetically engineered enhancement of salt tolerance in higher plants, Hidenori Hayashi and Norio Murata; molecular responses to drought stress, Kazuo Shinozaki and Kazuko Yamaguchi-Shinozaki. Part 4 Acclimation to nutrient supplies: nitrogen-responsive expression of C4 photosynthesis genes in maize, Tatsuo Sugiyama; molecular mechanisms of CO2 concentration and proton extrusion in cyanobacteria, Teruo Ogawa et al; transcriptional and post-translational regulation of nitrate utilization in the cyanobacterium "synechococcus" sp. strain PCC 7942, Tatsuo Omata; molecular aspects of sulfur assimilation and acclimation to sulfur supply in plants, Kazuki Saito; molecular mechanism of the metabolism of nitrogen dioxide as an alternative fertilizer in plants, Hiromichi Irifune; acclimation and signal transduction in response to phosphate limitation in a cyanobacterium, "synechococcus" PCC 7942, Takeshi Mizuno.