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Taxes (Taxic Movements) Miscellaneous Movements Photoperiodism

Phytochromes and Cryptochromes A Flowering Hormone? Temperature and Growth Dormancy and Quiescence Summary

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This chapter introduces growth phenomena with a discussion of the distinctions among growth, differentiation, and development. This is followed by a discussion of plant hormones (auxins, gibberellins, cytokinins, abscisic acid, ethylene) and their roles in plant growth and development. The chapter explores plant movements, including nutations, twining, contraction, nastic, tropic, turgor, and solar tracking movements. The discovery and functions of photoperiodism and phytochrome are briefly surveyed. The chapter concludes with a discussion of the relationship of temperature to growth and dormancy.

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