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Capítulo 36
Hormonas Vegetais
Plant hormones—or phytohormones—are chemical molecules that modulate one or more physiological processes of a plant. In animals, hormones…
Fotorreceptores e Respostas das Plantas à Luz
Light plays a significant role in regulating the growth and development of plants. In addition to providing energy for photosynthesis, light provides…
Relógios Biológicos e Respostas Sazonais
The circadian—or biological—clock is an intrinsic, timekeeping, molecular mechanism that allows plants to coordinate physiological…
Respostas à Gravidade e ao Toque
Gravitropism: Plant Responses to Gravity Higher plants sense gravity using statocytes, cells found near the vascular tissue in shoots, and in the…
Respostas à Seca e às Inundações
Water plays a significant role in the life cycle of plants. However, insufficient or excess of water can be detrimental and pose a serious threat to…
Respostas ao Stress do Calor e do Frio
Every organism has an optimum temperature range within which healthy growth and physiological functioning can occur. At the ends of this range, there…
Respostas ao Stress do Sal
Salt stress—which can be triggered by high salt concentrations in a plant’s environment—can significantly affect plant growth and…
Defesas Contra Agentes Patogénicos e Herbívoros
Plants present a rich source of nutrients for many organisms, making it a target for herbivores and infectious agents. Plants, though lacking a…

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