CAB Focus on Plant Growth Regulators - Plant Growth Regulator Abstracts Online, updated weekly. Commercial service to which a free trial is available. - http://www.cabi.org/AbstractDatabases.asp?SubjectArea=&PID=47
CABFocus on Crop Physiology - Offers a subscription to access regularly updated abstracts relevant to crop physiology. - http://www.cabi.org/AbstractDatabases.asp?SubjectArea=&PID=35
Hadi Farazdaghi - Personal website of Hadi Farazdaghi, includes a paper on an alternative C3 photosynthesis model to that of Farquhar and Von Caemmerer. - http://www.farazdaghi.com
Plants in Action Textbook - Detail on the Australian plant physiology textbook. - http://www.plantsci.org.au/publications/PlantsInAction.html