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  2. Plant senescence - Wikipedia

    en.wikipedia.org/wiki/Plant_senescence

    Plant senescence is the process of aging in plants. Plants have both stress-induced and age-related developmental aging. [1] Chlorophyll degradation during leaf senescence reveals the carotenoids, such as anthocyanin and xanthophylls, which are the cause of autumn leaf color in deciduous trees. Leaf senescence has the important function of ...

  3. Nitrogen deficiency - Wikipedia

    en.wikipedia.org/wiki/Nitrogen_deficiency

    Symptoms of nitrogen deficiencies in plants is general chlorosis of the leaves, which is when leaves turn pale green, and leaves cup upwards quite severely in deficient plants. [4] Nitrogen deficiencies also cause leaves to remain small, and drop prematurely, resulting in less photosynthesis occurring in the plant, and fewer, smaller tubers can ...

  4. Why Your Peace Lily Has Brown Tips: 9 Causes and How to Fix Them

    www.aol.com/lifestyle/why-peace-lily-brown-tips...

    By the time the leaves turn brown, they’re dying, and your plant needs you to get busy with a watering can. ... If the leaves on your peace lily start turning brown, you may be giving the plant ...

  5. Panama disease - Wikipedia

    en.wikipedia.org/wiki/Panama_disease

    The leaves begin to wilt and may buckle at the base of the petiole. As the disease progresses, younger leaves are affected, turn yellow and crumple and the whole canopy begins to consist of dead or dying leaves. [5] The leaf symptoms of Fusarium wilt can be confused with those of Xanthomonas wilt.

  6. Autumn leaf color - Wikipedia

    en.wikipedia.org/wiki/Autumn_leaf_color

    Autumn leaf color is a phenomenon that affects the normally green leaves of many deciduous trees and shrubs by which they take on, during a few weeks in the autumn season, various shades of yellow, orange, red, purple, and brown. [1]

  7. Narcissus (plant) - Wikipedia

    en.wikipedia.org/wiki/Narcissus_(plant)

    Leaf colour is light green to blue-green. In the mature plant, the leaves extend higher than the flower stem, but in some species, the leaves are low-hanging. The leaf base is encased in a colorless sheath. After flowering, the leaves turn yellow and die back once the seed pod (fruit) is ripe. [4]

  8. Iris longipetala - Wikipedia

    en.wikipedia.org/wiki/Iris_longipetala

    The leaves can be either dark green or bluish green and they can be equal or just shorter than the flowering stems. [7] [8] [9] They start at the base of the plant, rising up with a grass-like form. They are generally, between 5-11mm wide. [2] [3] [10] They are briefly deciduous, [11] turning grey or yellow-brown when dying. [5]

  9. Leaf - Wikipedia

    en.wikipedia.org/wiki/Leaf

    The leaves of tricussate plants such as Nerium oleander form a triple helix. The leaves of some plants do not form helices. In some plants, the divergence angle changes as the plant grows. [22] In orixate phyllotaxis, named after Orixa japonica, the divergence angle is not constant. Instead, it is periodic and follows the sequence 180°, 90 ...