Explain protoderm in primary growth in shoot, Biology

Explain Protoderm in primary growth in shoot?

The protoderm is one of the so-called "primary tissues" because it is formed first during germination and subsequent bud growth and development. The protoderm produces new cells on the surface of the apical meristem, and these surface cells migrate downward and mature into the epidermis of the shoot and leaves.

The epidermal layer provides physical protection for the other internal tissues, and most importantly, guards against drying out. The epidermis produces an outer waxy coating from a substance known as cutin. This cuticle layer prevents evaporative water loss. However, leaves need carbon dioxide and they need to get rid of oxygen, so they provide openings for this gas exchange through special cells called guard cells. Two guard cells make up a functional unit, whose scientific name is stomata, or stomate.

Posted Date: 4/30/2013 2:45:48 AM | Location : United States







Related Discussions:- Explain protoderm in primary growth in shoot, Assignment Help, Ask Question on Explain protoderm in primary growth in shoot, Get Answer, Expert's Help, Explain protoderm in primary growth in shoot Discussions

Write discussion on Explain protoderm in primary growth in shoot
Your posts are moderated
Related Questions
CRP is a marker of systemic inflammation. As the role of inflammation in the initiation and progression of atherosclerosis becomes better understood, CRP has gained prominence as a

Explain Hypertensive Disorders of Pregnancy? Hypertension may have been existing before pregnancy. Alternatively, a mother may develop hypertension during pregnancy, a pregnanc

Q. How does photosensitivity in annelids, cnidarians and worms differ from insects, cephalopods and vertebrates? In the first mentioned group of animals there are photoreceptor

can u show the different activities on the topic

Why is not Mendel's second law always valid for two or more phenotypical traits of an individual? The Mendel's second law, or the law of the independent assortment, is valid fo

Q. Does glycolysis take place within the mitochondria? Glycolysis happens in the cytosol and not in the mitochondria. Pyruvic acid molecules later enter mitochondria to partici

Sex Determination - Reproduction Sex, whether an individual will be a male or a female is determined at fertilisation, and this directs and controls all the later processes i

EGG S OF INSECT This eggs is centrolecithal and it is elliptical. It diameter is 2-3 mm. It has two eggs membrane i.e. vitelline membrane and chitinous capsule. The chit

Polychaetes - Feeding and Digestion in Annelids Polychaetes involve both free moving (errant) and sedentary species. The free moving species are usually macrophagous and the s

Define Eggs as a rich source of protein? Roughly, the chicken egg consists of 11% shell, 31% yolk and 58% white. Liquid whole egg consists of 65% white and 35% yolk. The primar