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Transport in Plants

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Biology

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Biology

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CBSE Gujarat Board Haryana Board

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Class 10 Class 12
How is mycorrhizal association helpful in absorption of water and minerals in plants?

Mycorrhiza : It is the symbiotic association between roots of some plants and fungi. The hyphae provide a very large surface area and absorb mineral ions and water from soil. This is not possible for roots. The fungi provides mineral and water to roots. The hyphae secrete chemicals which protect the roots from pathogens. Thus  mycorrhizal association is helpful in absorption of water and minerals in plant cells. 

 

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Why the cortex produces no resistance to movement of water ?

The cortical cells are loosely packed and produce no resistance to movement of water via cell walls or apoplast.
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Why the water is forced to move through cell membrane beyond endodermis ?

Water is forced to move through cell membranes beyond endodermis because of the suberin (waxy substance) present on radial walls of endodermal cells blocks water and solute movement through cell walls of endodermis. 
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Give the term for the ability to resist a pulling force.

Tensile strength
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What is transmembrane pathway ?

The movement of water through cell membranes is called trans membrane pathway.
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Who introduced the apoplast—symplast concept ?

E. Munch (1930).
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