Q.1
Given below are two statements, one is labelled as Assertion (A) and other one labelled as Reason (R).
Assertion (A) : The inability of plants to meet the evapotranspirational demand is known as moisture stress
Reason (R) : The concentration of abscisic acid and expression of stress responsive genes decreases in response to water
stress
In light of the above statements, choose the correct answer from the options given below.
EXPLANATION
Molecular Markers and Mapping Populations
- Assertion (A) is True: Moisture stress develops whenever atmospheric evaporative demand exceeds the hydraulic capacity of the soil-root-vascular system to supply water.
- Reason (R) is False: During water stress, endogenous levels of abscisic acid (ABA) increase drastically (often 20- to 50-fold) to stimulate stomatal closure, and expression of stress-responsive genes (such as LEA proteins, dehydrins, and osmotin) is strongly upregulated, not decreased.
- Conclusion: (A) is true but (R) is false.
Correct option: (3) (A) is true but (R) is false.
Explanation not matching this question?
क्या व्याख्या इस प्रश्न से मेल नहीं खा रही?
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