The longer night as summer turns into fall is responsible for the changing color of leaves in the autumn. As days grow shorter, the longer and cooler nights trigger biochemical changes in the leaves that turn them differ... More »

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Leaves turn brown in autumn due to the deterioration of chlorophyll, the green pigment found in all leaves responsible for absorbing light for photosynthesis, explains the U.S. Forest Service. Intrinsically, the trees ar... More »

Plants have leaves so they can get nourishment. The process of photosynthesis, in which the plant absorbs sunlight in order to turn carbon dioxide and water into food, occurs in the leaves. More »

Leaves turn brown in autumn due to the deterioration of chlorophyll, the green pigment found in all leaves responsible for absorbing light for photosynthesis, explains the U.S. Forest Service. Intrinsically, the trees ar... More »

According to Extension and Outreach at Iowa State University, the most common cause of brown needles on conifer trees is known as winter browning, which can result if the trees have not stored adequate amounts of water i... More »

Roses are perennials that last for many years, growing and blooming during the spring and summer and then going dormant during the fall and winter. Roses start out as seeds, but mature plants repeat this annual life cycl... More »

Plants adapt to different climates by modifying their leaves or stems or by shedding their leaves en masse in the fall and going dormant during the winter when there is less water available. They may also have root syste... More »