Which of the following is a direct result of removing too much leaf tissue during mowing?

• A. Physiological shock to the plant
• B. Increased drought tolerance
• C. Increased root depth
• D. Improved disease resistance

Answer: (A)

Removing too much leaf tissue during mowing strips the plant of its main energy source. Leaves drive photosynthesis, producing the sugars the plant uses to grow and repair tissues. When a large portion of leaf area is removed, photosynthesis drops sharply and stored carbohydrates are tapped to fuel regrowth and maintenance. The result is a rapid stress response—the plant can wilt, grow more slowly, and recover poorly or unevenly. This immediate stress response is what we call physiological shock.

The other options aren’t direct consequences of mowing off a lot of leaf tissue. Drought tolerance isn’t increased just by defoliation and is more about the plant’s longer-term adaptations and water management. Root depth isn’t suddenly increased by removing leaves; energy for root growth is limited when photosynthesis is reduced. Disease resistance isn’t improved by taking off leaf tissue and, in fact, wounds from mowing can raise infection risk while the plant’s energy reserves are depleted.