Respiration climacteric Some fruits at a certain stage of maturation, experience a transient rise in respiration, 100 果实生长 called respiration climacteric 50 果实呼吸 Respiration climacteric. >Caused by ethylene 0 >Marks the completion of fruit 细果 果果 细胞分裂幼果 ripening 胞实 实实 胀体 成衰 >Can be manipulated 大积 熟老 增大
Respiration climacteric Some fruits, at a certain stage of maturation, experience a transient rise in respiration, called respiration climacteric. Respiration climacteric: ➢Caused by ethylene ➢Marks the completion of fruit ripening. ➢Can be manipulated
Respiration climacteric Some plant organS, especially leaves and some fruits experience a transient rise in 100 果实生长 respiration, called respiration climacteric 50 果实呼吸 Respiration climacteric >Caused by ethylene 0 > Marks the completion of fruit 细果 果果 细胞分裂幼果 ripening 胞实 实实 胀体 成衰 >Can be manipulated 大积 熟老 增大
Respiration climacteric Some plant organs, especially leaves and some fruits, experience a transient rise in respiration, called respiration climacteric. Respiration climacteric: ➢Caused by ethylene ➢Marks the completion of fruit ripening. ➢Can be manipulated
Mechanism of ethylene action The RANI protein is ethylene receptor. @ a model for ethylene signal TR1 and the other ethylene (ADP) Activation activity of CTRl. This leads transduction pathway Receiver ethylene response pathway. rough a MAP HOOC COOH RAF-like activation which causes kinase CTR1 to become inactive The inactivation of CTR1 MAPK? MAPKK? ome Penetration of EIN2 turns NUCLEUS on factors, which E duce th in of ERF1. The Transcription Cell wall weakening(细胞壁变软 ERF le changes ultimately bring about alterations in cell functions Ethylene response genes Cellulase(纤维素酶)
A model for ethylene signal transduction pathway Mechanism of ethylene action Cellulase (纤维素酶) Cell wall weakening (细胞壁变软） Penetration