×
Log in to StudySoup
Get Full Access to Purdue - SC 11000 - Class Notes - Week 2
Join StudySoup for FREE
Get Full Access to Purdue - SC 11000 - Class Notes - Week 2

Already have an account? Login here
×
Reset your password

PURDUE / Botany and Plant Pathology / BTNY 11000 / What is the main purpose of secondary growth in a woody stem?

What is the main purpose of secondary growth in a woody stem?

What is the main purpose of secondary growth in a woody stem?

Description

School: Purdue University
Department: Botany and Plant Pathology
Course: Introduction to Plant Science
Professor: Robert peter b goldsbrough
Term: Fall 2016
Tags: botany
Cost: 25
Name: Botany Week 2 Tisses
Description: Covers all the different tissues found in plants
Uploaded: 09/09/2016
2 Pages 242 Views 1 Unlocks
Reviews


Botany 


What is the main purpose of secondary growth in a woody stem?



Tissues 

∙ Tissues: composed of one or more cell type with specialized functions ∙ Plants develop from a single cell

∙ Primary apical (root and shoot) meristems arise during embryonic  development

∙ Secondary meristems (vascular cambium and cork cambium) continue  expansion and develop in woody plants during later development (ex.  trees)

∙ Tissues are derived from meristems

o Also are organized regions of cells of similar structure that preform a  collective function  

∙ Meristematic Cells: divide and then differentiate into other tissues  o thin walls and dense cytoplasm  


How do meristematic cells differ from other cells?



▪ dermal tissues

▪ ground tissues  

▪ vascular tissues

∙ Dermal 

o Outermost layer of the plant (skin)

o Epidermis: is usually a single, exterior layer of flattened cells  providing protection  

▪ also contains specialized cells that regulate gas exchange guard cells- controlling the aperture of pores called stomata ▪ frequently also contains trichromes or leaf hairs that have  many different functions  

o Cuticle: multilayered structure secreted by epidermal cells of leaves  and stems (outside of epidermis, 7 layers, a way layer aka  


What is the structure and function of a cuticle?



hydrophobic)

o In woody plants, when the epidermis cracks, the cuticle comes in and  replaces it

∙ Ground

o Parenchyma: living cells comprise the bulk of leaves. Where  photosynthesis occurs bc its full of chloroplast Don't forget about the age old question of What is habituation in psychology?

o Sclerenchyma: some wall thickening (cellulose) support to young  stems, petioles and leaf veins (celery strings) Don't forget about the age old question of What is systematic observation in research?

∙ Vascular 

o Liquid conducting tissues pf plants We also discuss several other topics like What is financial accounting and reporting?
If you want to learn more check out What does alexander hamilton known for?
Don't forget about the age old question of What is the instrument that produces sound by the vibration of the body of the instrument?

o Continuous throughout the plant from roots, through stems and into  leaf veins

o Water, nutrients, and solutes to move through the plant body ∙ Xylem- moves water and nutrients from roots to shoots

o Conducts water and dissolved minerals from the roots to all parts of  plants (transpiration)

∙ Pholem- moves sugars (mainly) from sources to sinks

o Translocation- of food and metabolities from leaves (source) to  flowers, roots, storage organs and meristems (sink)

o composed of sieve-tube members (long slender cells with porous  ends [sieve plates]) We also discuss several other topics like What toxins does the kidney remove?

o companion cells aid in translocation  

∙ Taxony 

o Evolution of planta going for a long time

o Early plants lacked seeds

o Flowering plants are divided into a number of groups based primarily on floral structures  

o The monocots and dicots are big groups but differ in jobs

Page Expired
5off
It looks like your free minutes have expired! Lucky for you we have all the content you need, just sign up here