Which of the following plant shows Tritegmic ovule?

Tritegmic ovules are three integumented ovules. These are seen in Asphodelus, litchi and Trianthema.

What happens to integuments of the ovules after fertilization?

The integuments develop into the seed coat when the ovule matures after fertilization. The integuments do not enclose the nucellus completely but retain an opening at the apex referred to as the micropyle. The micropyle opening allows the pollen (a male gametophyte) to enter the ovule for fertilization.

What does the integuments become after fertilization?

Following fertilization, the integuments develop into the seed coat.

What is tritegmic ovule?

Tritegmic- Ovules that have three layers of integument are called tritegmic, like Asphodelus. It has been observed that the lesser the number of integuments, more specialized is the integument itself.

What is Crassinucellate ovule?

Definition. The presence of two or more cell layers between the megasporophyte and the epidermal cells in the early development of the megasporophyte. The megasporophyte develops into the embryo sac which contains the egg that, if fertilized and the conditions are right, will develop into the embryo.

What is Ategmic ovule give example?

Caruncle is common in the ovules of Euphorbiaceae. e.g., Castor (Ricinus). (v) Ategmic : In some parasites like Loranthus, Viscum, Santalum etc., there is no integument. Such an ovule is called ategmic.

What is Hemianatropous ovule?

When funicle lies at right angle to body of ovule and micropyle, the ovule is called hemianatropous or body of ovule has rotated by 90o.

What are integuments in plants?

In botany, the integuments are the outer layer(s) of the ovule and develop into a seed coat as the ovule matures following fertilization.

What is the fate of outer integument?

➡ Ovule will be forming zygote after syngamy. ➡ Zygote will form the seed. ➡ Outer integument will form testa. ➡ Inner integument will form tegmen.

What is Orthotropous ovule?

Orthotropous ovule is the simplest and primitive type of ovule. In this type of ovule, micropyle, chalaza and funiculus lie in one vertical plane. Example of plants with orthotropous ovules are, Polygonum, Piper nigrum, Piper betel and all gymnosperms.

What is Campylotropous ovule?

1. campylotropous ovule – a curved ovule with the micropyle almost touching the funiculus. ovule – a small body that contains the female germ cell of a plant; develops into a seed after fertilization.

What is Amphitropous ovule?

Definitions of amphitropous ovule. a partly inverted ovule turned back 90 degrees on its stalk. type of: ovule. a small body that contains the female germ cell of a plant; develops into a seed after fertilization.

What are tritegmic ovules?

Tritegmic ovules are three integumented ovules. These are seen in Asphodelus, litchi and Trianthema. Third integument is considered as an outgrowth of one of the two integuments. In litchi the third integument is fleshy and is called as aril.

What is the function of the integument of ovules?

The integument of the ovules become the seed coat of the seed. There is the formation of a diploid zygote and it develops into an embryo, which forms the future plant. (iv) The outer integument forms the testa. The inner integument forum the tegmen.

What happens to the ovule of a flower after fertilisation?

In a flower, the ovule starts to swell after fertilisation, and it starts to toughen up in the due process of becoming a seed. The ovary starts growing around it and becomes a fruit. However, this is not true for all plants. Plants like avocado have a single ovule, while kiwi has many ovules which can develop into fruits.

What is the final product of fertilization called?

The final product of fertilization–the embryo–is encased in a seed. For this reason, these two types of tracheophytes are termed seed plants. (See Plant Structures and Functions, The Seed.) The female gametophyte contains several archegonia, where the egg cells originate and develop.