华东师范大学：《植物生理学》课程资源（实验课教学课件）乙烯对植物生长效应的观察 Triple response

Triple response Course: Plant Physiology Lab Experimental Teaching Centre Of Life Sciences

Triple response Course: Plant Physiology Lab Experimental Teaching Centre Of Life Sciences

What is the triple response? Dark-grown pea seedlings growing in the laboratory exhibited symptoms that were later termed the triple response: reduced stem elongation, increased lateral growth(swelling) and abnormal, horizontal growth. When the plants were allowed to grow in fresh air, they regained their normal morphology and rate of growth

What is the triple response? • Dark-grown pea seedlings growing in the laboratory exhibited symptoms that were later termed the triple response: reduced stem elongation, increased lateral growth (swelling), and abnormal, horizontal growth. When the plants were allowed to grow in fresh air, they regained their normal morphology and rate of growth

Protein Methionine< Synthesis HCOOH ATP SAM Synthetase Methylated Acceptors Hc MTA Ade Spermidine/ Spermine biosynthesis pathway S-AdoMet ACC Synthase (high activity or stable protein? Ptase Ooc MACC d ACC (low activity or unstable protein?)H Calcium? D Ac oxdase ROS? Hormones? Transcription H regulation ethylene Stresses: Pathogen infections. Wounding, Ozone, UV-B, etc

ETR1 ERS1 ETR2 EIN4 ERS2 S C2H4 Membrane =m0=0=0 CTR1 RAN1 E|N5? E|N6? EER1? ISR1? EIN3/EIL1/EIL2 DB DB ERF ERF1+other EREBPs? HLST GCC- Target genes ethylene receptors Ethylene Responses Differential Growth