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פרק 36
הורמוני צמחים
Plant hormones—or phytohormones—are chemical molecules that modulate one or more physiological processes of a plant. In animals, hormones…
קולנטי אור ותגובות צמחים לאור
Light plays a significant role in regulating the growth and development of plants. In addition to providing energy for photosynthesis, light provides…
שעונים ביולוגיים ותגובות עונתיות
The circadian—or biological—clock is an intrinsic, timekeeping, molecular mechanism that allows plants to coordinate physiological…
תגובות לכח הכבידה ולמגע
Gravitropism: Plant Responses to Gravity Higher plants sense gravity using statocytes, cells found near the vascular tissue in shoots, and in the…
תגובות לבצורת והצפה
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…
תגובות לעקת חום וקור
Every organism has an optimum temperature range within which healthy growth and physiological functioning can occur. At the ends of this range, there…
תגובות לעקת מלח
Salt stress—which can be triggered by high salt concentrations in a plant’s environment—can significantly affect plant growth and…
הגנה מפני פתוגנים ואוכלי צמחים
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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