What is idioblast cells?
An idioblast is an isolated plant cell that differs from neighboring tissues. They have various functions such as storage of reserves, excretory materials, pigments, and minerals. They could contain oil, latex, gum, resin, tannin or pigments etc.
Where are idioblast cells found?
Specialized idioblast cells are present in avocado-fruit tissue, and contain lipid and lipid-soluble compounds. One well-known lipid-soluble compound is persin [(+)-(Z,Z)-1-acetoxy-2-hydroxy-12,15-heneicosadie-4-one], originally isolated and identified from avocado leaves.
What cells are parenchyma?
Parenchyma tissue is composed of thin-walled cells and makes up the photosynthetic tissue in leaves, the pulp of fruits, and the endosperm of many seeds. Collenchyma cells mainly form supporting tissue and have irregular cell walls. They are found mainly in the cortex of stems and in leaves.
What are Druses and Raphides?
Raphides are bundles of needle-like crystals that represent the most common crystal type in monocots. By contrast, druses (cluster crystals) are roughly spherical aggregates of crystals that occur in only a few early-divergent monocot families, but are common in eudicots and early-divergent angiosperms.
Where are Tyloses found?
Tyloses are common in xylem vessels of many genera of angiosperms including Populus, Rhus, Robinia, Morus, Sassafras, Catalpa, Juglans, and Quercus, but they never occur in many other genera. Tyloses often block water transport in vessels and cause injury by dehydration.
What is Tyloses function?
Tyloses can aid in the process of making sapwood into heartwood in some hardwood trees, especially in trees with larger vessels. These blockages can be used in addition to gum plugs as soon as vessels become filled with air bubbles, and they help to form a stronger heartwood by slowing the progress of rot.
What is Laticifers in plants?
Laticifers are highly specialized cells forming a tube-like network structure throughout the plant body, occurring in phylogenetically unrelated groups. Laticifers produce and store latex that is released upon rupture of laticifers.
What is parenchyma explain?
The parenchyma is the functional parts of an organ, or of a structure such as a tumour in the body. This is in contrast to the stroma, which refers to the structural tissue of organs or of structures, namely, the connective tissues.
What is the function of parenchyma cells?
Parenchyma cells are typically alive in maturity and conduct most of the plant’s metabolic functions, such as storage of energy (mainly in the form of starch and fats) and waste products (tannin, resins, gums, etc.), support for photosynthesis (as are the cells containing chlorophyll), gaseous exchange (which takes …
What is Cystolith and raphides?
Cystoliths are crystals of calcium carbonate, while raphides are crystals of calcium oxalate.
What is the function of raphides?
Raphides seem to be a defense mechanism against plant predators, as they are likely to tear and harm the soft tissues of the throat or esophagus of a plant predator chewing on the plant’s leaves. The venomous process is in two stages: mechanical pricking and injection of harmful protease.
What is the role of tyloses?