Which outcome occurs when a prolonged drought causes excessive abscisic acid production?

💡 Explanation

When drought occurs, abscisic acid (ABA) accumulation triggers stomata closure because ABA induces guard cells to lose turgor via ion efflux, causing stomata pores to narrow, reducing transpiration. Therefore stomata closure occurs, rather than increased rubisco activity, enhanced chlorophyll synthesis, or accelerated translocation which require ample water.

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