31. The sand-dune marram grass has rolled leaves with stomata on the inner surface. 32. Stomata therefore play the important role in allowing photosynthesis without letting the leaf dry out.33. Thus, infection occurs only on the underside of leaves, where stomata are found. 34. Adaptations include thick cuticles, rolled leaf margins, sunken stomata or lacking leaves altogether. 35. C3 and C4 plants ( 1 ) stomata stay open all day and close at night. 36. Bacteria typically enter the fruit through their stomata , three to four weeks after fruit set. 37. As the fruit develops, wax fills and blocks stomata , eliminating entry to the bacteria. 38. The plant obtains water not from its host plants, but through stomata in its leaves. 39. Environmental conditions affect the development of stomata , in particular their density on the leaf surface. 40. In very dry soil, plants close their stomata to reduce transpiration and prevent water loss.
