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Journal of Experimental Botany, Vol. 52, No. 358, pp. 1117-1121, May 1, 2001
© 2001 Oxford University Press

Short Communication

Leaf senescence in rice plants: cloning and characterization of senescence up-regulated genes

Ruey-Hua Lee1, Chung-Hua Wang2, Lin-Tzu Huang1 and Shu-Chen Grace Chen1,3

1 Institute of Botany, Academia Sinica, Taipei, Taiwan
2 Institute of Biochemistry, National Yang-Ming University, Taipei, Taiwan

Abstract

To identify senescence-associated genes (SAGs) in rice leaves, senescence was induced by transferring rice seedlings into darkness. Senescence up-regulated cDNAs were obtained by PCR-based subtractive hybridization. Among 14 SAG clones characterized, 11 were found to be associated with both dark-induced and natural leaf senescence. Three clones were associated only with dark-induced leaf senescence. The possible physiological roles of these SAGs during rice leaf senescence are discussed.

Key words: Dark-induced senescence, gene expression, natural leaf senescence, rice.


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