Summary
OCR A-Level Biology Plant Transport(2) Summary
A HandWritten summary which contains all the necessary A* Content for Transport in Plants at OCR A-Level Biology.
[Show more]
Seller
Follow
Content preview
Stomata Close when :furgor is low
Opening Guard cells pump in solutes by active transport sturgor increases
. :
Closing
:
Hormonal
signals from the roots
trigger turgor loss ->
water is conserved
Factors
Affecting transpiration light :
,
humidity , temperature ,
Air movement, Water availability
~sideplate
phloem A transports organic
S
living fissue which solutes
:
mpanion
CO e
⑧
sincture translocation
↳
sources Green leaves and stems
storage organs food stores
:
, ,
fruit or
Sinks Roots meristems
developing food stores i. e seeds
:
.
, ,
Phloem loading :
-Symplast Route Assimilates through cytoplasm and plasmodesmata passive
:
move the
-Apoplast Route :
7 Ations removed from
by active transport
are the
companion cen
.
H returns down
gradient via cotransport protein sucrose is co.transported into the
2 .
a a cen
.
3
Water moves into
high solute concentration companion cels building turgor pressure ,
4 and
Water assimilates are forced into the
phloem and move around the plant by mass flow
.
to areas of lower pressure the sinks
Phloem
Unloading Sucrose diffuses into sinks rapidly down a concentration gradient
:
Xerophytes
:
Plants adapted to live in areas of low water
availibility
↳ Adaptations :
·
Thick waxyfuticle Sunken Stomata
-
Fewer Stomata and leaves
-
Curled leaves
-Hairy leaves Parenchyma tissue to store water Leafloss
Long roots
-
- -
Hydrophytes Plants adapted to live in agreous environments
:
↳ Adaptations :
Thin or no
waxy Cuticle
-
Reduced Structure Wide flat leaves
,
-
Small roots
-large surface area Air sacs ->
floating
-
Arenchyma with air
space
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller faithcortis. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for £2.99. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
84251 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy revision notes and other study material for 14 years now