[Answer] How would this affect the ability of the leaf to retain water especially in dry conditions?

Answer: If the stomata are open in dry conditions then the leaf could lose water vapor and dehydrate/dry out. Less water for photosynthesis and so the rate of photosynthesis and glucose production would decrease.
How would this affect the ability of the leaf to retain water especially in dry conditions?

Elevated humidity levels slow the transpiration rate (water loss from leaves ) and prevent the cutting from drying out. Mold is a common hazard due to the higher humidity and stressed cutting. Mold is a common hazard due to the higher humidity and stressed cutting.

Plants absorb water from the soil which then evaporates from their shoots and leaves ; this process is known as transpiration. In dry environments a typical mesophytic plant would evaporate water faster than the rate of water uptake from the soil leading to wilting and even death.. Xerophytic plants exhibit a diversity of specialized adaptations to survive in such water -limiting conditions .

Soil water (retention) – Wikipedia

Xerophyte – Wikipedia

Soil water (retention) – Wikipedia

Climate change adaptation – Wikipedia

Sphagnum is a genus of approximately 380 accepted species of mosses commonly known as “peat moss” though they are different as peat moss has a more acidic pH level.Accumulations of Sphagnum can store water since both living and dead plants can hold large quantities of water inside their cells; plants may hold 16 to 26 times as much water as their dry weight depending on the species.

Soil water retention capacity. Pores (the spaces that exist between soil particles) provide for the passage and/or retention of gasses and moisture within the soil profile.The soil’s ability to retain water is strongly related to particle size; water molecules hold more tightly to the fine particles of a clay soil than to coarser particles of a sandy soil so clays generally retain more water .

By definition succulent plants are drought resistant plants in which the leaves stem or roots have become more than usually fleshy by the development of w…

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