INTRODUCTION | Transport in Plants - Plant Physiology | Biology Class 11 Chapter11 NCERT | NEET скачать в хорошем качестве

INTRODUCTION | Transport in Plants - Plant Physiology | Biology Class 11 Chapter11 NCERT | NEET

How and why substances move from one cell to the other, whether all substances move in a similar way, in the same direction and whether metabolic energy is required for moving substances? In a flowering plant the substances that would need to be transported are water, mineral nutrients, organic nutrients and plant growth regulators. Over small distances substances move by diffusion and by cytoplasmic streaming supplemented by active transport. Transport over longer distances proceeds through the vascular system and is called translocation. Xylem transports water and mineral nutrients taken up by the roots to all parts of the plant, up to the very tip of the growing stem and transport through xylem is unidirectional. Phloem transports the photosynthates or food synthesised by the leaves to all parts including the root tips embedded inside the soil. Plant growth regulators or hormones and other chemical signals are also transported in a strictly polarised or unidirectional manner.There is a complex traffic of compounds moving in different directions. #NEET2021 #Transport_in_plants #NCERT_class11_chapter11 #Introduction