Agronomy root test

what are the functions or purpose of roots?

• absorb water and nutrients

• anchor the plant in the ground

• store food / energy (starch)

• transport water and nutrients

what are the 2 types of roots and where do they develop from?

• taproot →develops from the radicle

• Fibrous root → develops from the stem

Explain what type of rooting depth roots will have in a dry silty soil?

• roots will grow deeper to reach water

• usually develop an deep taproot system

what are the 3 primary meristems that originate from the aprical meristem, and what do each of them produce?

protoderm →becomes epidermis

ground meristem→becomes cortex (ground tissue)

procambium →becomes vascular tissue (xylem and phloem)

__ cells absorb water and nutrients. they also produce __ which increases the adaptive surface area of the root

epidermis; root hairs

what part of the root does not absorb water and nutrients

root cap

how do they statocytes help the root

• they sense gravity and help root grow downwards

how do columella cells help the root

• contains statolith (starch filled structures)

• helps detect gravity and direct root growth

what is the purpose of the cortex and how is it internationally designed

• stores food

• moves water inwards to the vascular tissue

• designed with loosely packed cells for movement

what is contained in the stele

contained xylem and phloem

• xylem → transports water

• Phloem →transports sugars

Both provide support

where is the quiescent center located

center of the apical meristem

how does ta root actually grow

• cell divides in the apical meristem

• then they elongate

• then differentiate into specialized cells

what are the parts that make up a root tip

• root cap

• apical meristem (zone of cell division)

• zone of elongation

what is the purpose of the endodermis, and what helps it do its job

controls what enters the vascular system

• helper: Casparian strip

made of suberin (waxy material)