Question

In each of the following situations what happens to the rate of photosynthesis cloudy days,no rain fall in the areas, good manuring in area, stomata get blocked due to dust

Answer 1

$\underline{\textbf{Photosynthetic\:Rate =>}}$

$[1]$ in the first case , you are given that , environmental conditions are cloudy. Here in this case , the Sunlight will not enter the plant sufficiently and hence $Light\: Reaction$is affected.

Due to this , the assimilatory powers are not prepared sufficiently which in turn also reduces Dark reaction yield.

so , in first case ,

$\underline{\textbf{Photosynthetic\:Rate\:is\:DECREASED}}$

$[2]$ In the second case , no rain fall causes insufficient supply of water and causes inappropriate LIGHT REACTION.

here too ,

$\underline{\textbf{Photosynthetic\:rate\:is\:DECREASED}}$

$[3]$ In the third case , supply of minerals provide sufficient amount of CoEnzymes for $C_3$ ( Calvin ) cycle and $C_4$(Malic acid) cycle.

hence ,

$\underline {\textbf{Photosynthetic\:yield\:is\:INCREASED}}$

$[4]$ In the fourth case , as you know , stomata are the main site of Gaseous Exchange. If they get blocked , then $CO_2$ will not enter the leaf and $O_2$ will not escape the leaves , which in turn causes $Photorespiration$ which reduces ATP yield.

so , in this case ,

$\underline{\textbf{Photosynthetic\:yield\:is\:DECREASED}}$

Hope you understood ^_^

$\boxed {\underline{\textbf{BeHappy}}}$
$\boxed {\underline{\textbf{BeBrainly}}}$