What is intine in pollen?

What is intine in pollen?

The intine, the inner layer of the pollen wall, is essential for the normal development and germination of pollen.

Does intine form pollen tube?

During germination, intine (inner wall of pollen grain emerges out as pollen tube through one of the germ pores in exine (outer wall.

How intine is formed?

The bilayered intine is formed immediately after differentiation of the endexine. Subsequently the inner endexine becomes intensely infiltrated with intine matrix substances; this process is interpreted as transformation of the inner endexine into intine.

What is intine in biology?

Intine: It is the inner layer as clear from the name. It is made up of cellulose (hemicellulose) and Pectin. It is less resistant as compared to excine. > Excine: It is the outer layer of pollen grain.

What is intine and exine?

Exine is the outer layer. It is tough and resistant due to presence of tough substance called sporopollenin. Intine is inner to the exine and it resembles plasma membrane in structure. So, exine and intine are the parts of the pollen grain.

What is exine and intine made of?

The exine is made up of sporopollenin which is one of the most resistant organic material. The intine layer is made up of cellulose and pectin materials. The exine is hard and hence protects the pollen grains during adverse conditions.

Which component prepare intine of the pollen grain?

The intine is composed of cellulose and hemicellulose and the exine is made up of sporopollenin that is resistant against high temperature, alkali, strong acid, and enzyme. Therefore, we concluded that the intine layer of the pollen grains consist of both pectin and cellulose.

Is intine continuous?

Intine is a thick, non-continuous inner layer of pollen grain.

What is exine composed of?

sporopollenin
While the exine is composed of sporopollenin, a complex and highly resistant biopolymer containing fatty acids, phenylpropanoids, phenolics and carotenoids, the intine is largely composed of pectin and cellulose.

Is intine continuous or discontinuous?

Statement II : Intine is made of cellulose and pectin and it is discontinuous with germ pores.

How does osmir528 regulate rice-pollen intine formation?

OsmiR528 regulates rice-pollen intine formation by targeting an uclacyanin to influence flavonoid metabolism The intine, the inner layer of the pollen wall, is essential for the normal development and germination of pollen. However, the composition and developmental regulation of the intine in rice (Oryza sativa) remain largely unknown.

What is the inner layer of a pollen?

In pollen …are an inner layer, the intine, and an outer layer, the exine. The intine consists, at least in part, of cellulose or hemicellulose. In angiosperm: Anthers …at least two layers, the intine and the exine. The intine, or inner layer, consists primarily of cellulose and pectins.

What is the meaning of intine?

Definition of intine : the inner mostly cellulose wall of some spores and especially pollen grains First Known Use of intine 1835, in the meaning defined above

What is the structure of the intine of an anther?

The intine consists, at least in part, of cellulose or hemicellulose. In angiosperm: Anthers …at least two layers, the intine and the exine. 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.