Statement I : ABA is called as an anti-stress hormone.

Statement II : ABA stimulates the opening of stomata in the epidermis and decreases the tolerance of plants to various kinds of stresses.

Abscisic acid, is often referred to as the "stress hormone" in plants. It plays a crucial role in plant responses to various environmental stresses such as drought, salinity, and extreme temperatures. When plants experience stress, the level of ABA in their tissues increases, triggering various adaptive responses.

ABA generally causes the closure of stomata, which are small openings in the epidermis of leaves and other plant organs. This closure reduces water loss through transpiration and helps plants conserve water, making them more tolerant to drought and other water-related stresses. So, ABA promotes water conservation in plants rather than stimulating stomatal opening.