What is the shape of catharanthus pollen grains?
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What is the shape of catharanthus pollen grains?
Most, but certainly not all, are spherical.
What is Tricolporate pollen grain?
A tricolpate pollen grain is one that has three apertures, equally spaced and approximately parallel to the polar axis of the grain (Figure 8.2; see Chapter 12).
What are the different types of pollen grains?
On the basis of aperture types pollen grains of most families are grouped under three distinct types, namely colporate, colpate and porate. On the other hand, pollen grains of some families e.g. Cyperaceae, Juncaceae, Potamogetonaceae and Ruppiaceae are inaperturate.
What does a mature pollen grain represent?
Solution. The pollen grains represent the male gametophyte.
Which part is used in Catharanthus?
Plant profile
| Family | Apocynaceae |
|---|---|
| Hindi name | Bara Massi/ Sada Bahar |
| English name | Periwinkle |
| Trade name | Sada Bahar |
| Parts used | Root/ Leaves |
Which of the following is the characteristics of Catharanthus?
Answer: it is a perennial small herb upto 90 cm in height. stem is erect, lax branching with with flexible long branches purple aur light green.
What is Monosulcate pollen?
Definition. Referring to a pollen grain with one groove or furrow.
What are pollen grains 7?
What are Pollen Grains? Pollen grains are microscopic structures, which bear androecium – a male reproductive organ of a flower. The interior section of pollen grain contains cytoplasm along with the tube cell, which converts into a pollen tube and the generative cell releases the sperm nuclei.
What is the another name of pollen grain?
microspores
Other name for pollen grain is microspores.
What are the three components of a pollen grain?
Most pollen grains consist of three distinct parts. The central cytoplasmic part is the source of nuclei responsible for fertilization. The other parts constituting the wall of the grain are an inner layer, the intine, and an outer layer, the exine. The intine consists, at least in part, of cellulose or hemicellulose.
What is found inside pollen grains?
Pollen grains are microscopic structures that carry the male reproductive cell of plants. The inside of the grain contains cytoplasm along with the tube cell (which becomes the pollen tube) and the generative cell (which releases the sperm nuclei). The outer shell is made of two layers.
What is the use of Catharanthus?
Uses. In traditional medicine, the periwinkle has been used for relieving muscle pain, depression of the central nervous system, also used for applying to wasp stings and to heal wounds. Its application ranges widely from the prevention of diabetes to treatment of stomach ache (Gajalakshmi et al., 2013).
Which alkaloid is present in Catharanthus?
Catharanthus roseus is a medicinal plant belonging to the family Apocynaceae which produces terpenoid indole alkaloids (TIAs) of high medicinal importance.
What is the meaning of Catharanthus?
Catharanthus is a genus of flowering plants in the family Apocynaceae. Like the genus Vinca, they are known commonly as periwinkles.
What is composition of intine?
The intine, or inner layer, consists primarily of cellulose and pectins. The exine, or outer layer, is composed of a highly decay-resistant chemical called sporopollenin.
What are pollen grains 10?
What are pollen grains 12?
Hint:-Pollen is a powdery substance which is made of pollen grains. The pollen grains are produced by male microgametophytes of seed-bearing plants and produce male gametes for the sperm cells. The pollens are transferred to the male gametophyte so that the process of pollination can be completed.
Which is the largest pollen grain?
Zostera
The plant known to have the longest pollen grain till now is Zostera , with pollen grains up to 2500 µm long. The pollen grains have a tough outer wall. The wall is made up of cellulose and sporopollenin.
Which part of Catharanthus is used?
Therapeutic Uses Plant is used in cancer and diabetes; root paste is used in septic wounds; root decoction is used in fever; leaves are used in menorrhagia; leaf juice is used in blood dysentery.
Can we eat Catharanthus roseus leaves?
Our study clearly indicated a significant antidiabetic activity with the leaf juice of Catharanthus roseus and supports the traditional usage of fresh leaves by the Ayurvedic physicians for the control of diabetes.
