Leaves are important to plants and trees because they convert sunlight energy into food through a process called photosynthesis. Leaves have a chemical called chlorophyll in them, which is what allows them to photosynthesize.Know More
Leaves go through seasonal changes, which include:
Leaves change color in the fall because as temperatures cool, the chlorophyll in the leaves starts to break down, which signals to the tree that it needs to store the converted food in the tree, rather than in the leaves. The leaves change color because of the lack of chlorophyll, which is what makes the leaves green in the spring and summer months. The changing color depends on the presence of carotenoids or anthocyanins. Carotenoids are the chemicals that turn leaves brown, orange and yellow, whereas anthocyanins are the chemicals that cause leaves to turn purple or red.
Deciduous trees lose their leaves in autumn because as temperatures fall, the trees create a seal between the branch and its leaves that protects the branches from the freezing temperatures of winter. Evergreen trees, on the other hand, have needles instead of leaves, which are able to withstand the freezing temperatures because of their waxy coating. Needles remain green all year and do not change color or fall off.
To identify a white oak tree, inspect its leaves, bark and bud patterns. This procedure takes about five minutes. You need a measuring tape and knowledge of this species' distinguishing characteristics.Full Answer >
Willow trees can be differentiated by their leaves, their form, their bark and their catkins. Willows are mostly deciduous trees, which means they lose their leaves in the fall. Male and female flowers are found on different trees, and their leaves are usually long and narrow.Full Answer >
A Chinese pistache tree is an ornamental tree with a broad, bowed canopy that sheds its leaves annually. It requires infrequent watering and is commonly used to provide shade in gardens and along streets. Although Chinese pistache is in the same family as pistachio trees, it does not yield nuts.Full Answer >
The common reasons that a palm tree's leaves turn brown are very low temperature, too much or too little light, insufficient water and too much fertilizer, according to SFGate. Palms need proper care to grow healthy and have large fan or feathered leaves.Full Answer >