5th and 6th slot Lab-. Bring lab coats
 


Comments

Tarini
04/13/2012 11:44pm

What is the relay pump theory? Vital activities of xylem parenchyma and xylem rays?

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deepthi.uthaman
04/14/2012 7:59am

According to Godlewski there is a rhythmic change in the osmotic pressure of the living cells of xylem parenchyma and medullary rays which brought about a pumping action of water in an upward direction. The living cells absorb water due to osmosis and is passed to xylem vessels. The tracheids and vessels acted as water reservoirs.

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Tarini
04/14/2012 4:17am

One more doubt-
Malate ions produces malic acid with H ions lowering its synthesis by PEP carboxylase.
what does this mean? 'its' refers to what?

Reply
deepthi.uthaman
04/14/2012 8:00am

its refer to malic acid.

Reply
Tarini
04/14/2012 10:03am

thank you ma'am. but i still didn't get the malic acid line.

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