Published by Oxford University Press [2008] on behalf of the Society for Experimental Biology
Preface
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Many endogenous signals are known to regulate plant growth and development. These include the classical plant growth regulators (PGRs) auxin, cytokinins, ethylene, gibberellins, and abscisic acid (ABA), plus newly discovered signals such as mRNAs, sugars, amino acids, and proteins. Often these signals are synthesized distant from their site of action and must be transported within the plant. Some travel