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In ncert textbook of 1st pu, in the lesson called transport in plants it is mentioned that mineral nutrients are transported in multidirectional manner. But again in the next page it is mentioned that it is transported through xylem whose form of transport is always unidirectional. Finally the question is mineral nutrients are transported in unidirectional manner or multidirectional manner???

In ncert textbook of 1st pu, in the lesson called transport in plants it is mentioned that mineral nutrients are transported in multidirectional manner. But again in the next page it is mentioned that it is transported through xylem whose form of transport is always unidirectional.
Finally the question is mineral nutrients are transported in unidirectional manner or multidirectional manner???

Grade:12th pass

1 Answers

Arun
25763 Points
2 years ago
Organic and mineralnutrients however, undergo multidirectional transport. Organic compounds synthesised in the photosynthetic leaves are exported to allother parts of the plant including storage organs. From the storage organsthey are later re-exported. The mineral nutrients are taken up by theroots and transported upwards into the stem, leaves and the growingregions. When any plant part undergoes senescence, nutrients may bewithdrawn from such regions and moved to the growing parts. Hormonesor plant growth regulators and other chemical stimuli are also transported,though in very small amounts, sometimes in a strictly polarised orunidirectional manner from where they are synthesised to other parts.

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