bio form 5 - transportation.ppt

8/9/2019 bio form 5 - transportation.ppt

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1.8THE TRANSPORT OF

ORGANICSUBSTANCES ANDWATER IN PLANTS


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The Transport In P ant

The TransportO! Or"an#$

S%&stan$es

The TransportO!

Water

Ph oe' () e'

Trans o$at#on*%p+ar,s -

,o+n+ar,s

Transp#rat#on

*,o+n+ar,s


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The #'portan$e

O! trans o$at#onIn p ant

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the s%r0#0a o! a p ant,epen,s on the transport

o! or"an#$ s%&stan$es!ro' the ea0es to the

stora"e or"anss%$h as the roots or

to the "ro+th re"#ons

s%$h as &%,

trans o$at#on ena& ess%$rose the pro,%$t o!

photos)nthes#s to &estore, or $on0erte,#nto other s%"ars +hen

#t rea$hes #ts,est#nat#on


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transp#rat#on

The oss o! +ater 0apo%r Thro%"h e0aporat#on #n

p ants

Th#s oss o! +ater #sRep a$e, &) the a&sorpt#on

O! +ater !ro' the so# &)

The p ant roots12 +ater3 %se, !or photos)nthes#s

442 +ater3 e0aporates !ro' theLea0es an, ost to at'osphere

452 +ater3 thro%"h sto'ata o! ea0es152 +ater3 thro%"h ent#$e s o! +oo,) ste'

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6

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The #'portan$e

O! transp#rat#onIn p ants

1. he ps #n the a&sorpt#onan, transport o! +ater

an, '#nera s#ons !ro' the roots to the,#!!erent parts o! the p ants

/. pro,%$es a $oo #n" e!!e$t#n p ants

6. he ps to s%pp ) +ater to ap ants $e s !or 'eta&o #$

pro$ess

7. he ps to pre0ent p ants !ro'+# t#n" &) 'a#nta#n#n"

$e t%r"#,#t)


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The pro$ess o! transp#rat#on

The s%r!a$e o! the 'esoph) $e s are $o0ere, &) th#nLa)er o! +ater

Heat !ro' the s%n $a%ses the +ater on the e terna

S%r!a$e o! the 'esoph) $e s e0aporate

Th%s sat%rat#n" the a#r spa$e #n the 'esoph) +#thWater 0apo%r

O%ts#,e the sto'ata the a#r #n the at'osphere #sLess sat%rate,

Th#s 'eans that the $on$entrat#on o! +ater 0apo%r #n theAt'osphere #s o+er than #n the a#r spa$e o! the ea!

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The 'o0e'ent o! a#r $arr#es +ater 0apo%r a+a)!ro' the sto'ata

The oss o! +ater !ro' 'esoph) $e s 'a:es $e

H)perton#$ to an a,;a$ent $e

Water !ro' a,;a$ent $e ,#!!%ses #nto the 'esoph)B) os'os#s

In the sa'e +a) +ater $ont#n%es to ,#!!%se !ro' theNe#"h&o%r#n" $e s #nto the a,;a$ent $e s

E0ent%a ) +ater #s ,ra+n !ro' the ) e' 0esse s #nThe 0e#ns

The +ater 0apo%r #n the a#r spa$es e0aporates an, theWater 0apo%r ,#!!%ses !ro' the p ant thro%"h sto'ata

an #n$rease #n #"ht #ntens#t) #n$rease the rateo! transp#rat#on

> #"ht st#'% ates the open#n" o! the sto'ata

> as a res% t the sto'ata open +#,er. Hen$e 'ore +ater ?apo%r e0aporates thro%"h the sto'ata.

1 L#"ht #ntens#t)


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1 L#"ht #ntens#t)

L#"ht #ntens#t)

RateO!

transp#rat#on


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> an #n$rease o! te'perat%re #n$reases the rate o! transp#rat#on

> an #n$rease o! te'perat%re #n$reases the rate o!E0aporat#on o! +ater !ro' the s%r!a$e o! the 'esoph)Ce s. The rate o! ,#!!%s#on o! +ater thro%"h the sto'ata

A so #n$rease

/ Te'perat%re


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/ Te'perat%re

Te'perat%re

RateO! transp#rat#on


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> as the +ater 0apo%r that ,#!!%ses thro%"h the sto'ataA$$%'% ates near the ea! s%r!a$e a !aster a#r @o0e'ent he ps to re'o0e the +ater 0apo%r.

> a#r 'o0e'ent #n$reases the $on$entrat#on "ra,#entBet+een the 0apo%r #n the ea! an, o%ts#,e the ea!.

Th#s #n$rease the transp#rat#on rate.

> +hen the a#r #s st# the transp#rat#on rate ,e$reasesOr stops a to"ether

6 A#r @o0e'ent


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6 A#r 'o0e'ent

W#n, 0e o$#t)



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> h#"h h%'#,#t) s%rro%n,#n" the ea0es re,%$es theE0aporat#on o! +ater !ro' the sto'ata.

> th#s $a%ses transp#rat#on to s o+ ,o+n.

> $on0erse ) a r#se #n te'perat%re o+ers the re at#0eH%'#,#t) o! the s%rro%n,#n" a#r an, th#s #n$rease

The rate o! transp#rat#on.

7 Re at#0e h%'#,#t)


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7 Re at#0e h%'#,#t)

Re at#0e h%'#,#t)



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The@o0e'ent

O! +ater Thro%"h theroots


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The 'o0e'ent o! +aterFro' the roots to the

Lea0es #s ass#ste, &)

Rootpress%re

Transp#rat#onap%

Cap# ar)a$t#on


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@o0e'ent o! +ater thro%"h the roots

The root ha#rs are s%rro%n,e, &) so# part#$ es.

So# part#$ es are %s%a ) $o0ere, &) th#n !# ' o! +ater.

The $)top as' o! root ha#rs #s %s%a ) h)perton#$ toThe s%rro%n,#n" so# +ater.

Th#s 'eans that root $e s ha0e a h#"her $on$entrat#onO! so %tes than the +ater #n the s%rro%n,#n" so# .

Hen$e +ater enters the root ha#rs $e s 0#a os'os#s

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Water than ,#!!%ses #nto the a,;a$ent $e s.

In th#s +a) +ater 'o0es #n+ar, !ro' $e to $e %nt#

E0ent%a ) #t rea$hes the $orte .

Water ! o+s thro%"h the $)top as' 0a$%o es an, $eWa s o! the paren$h)'a $e s #n the $orte %nt#

It rea$hes the en,o,er'#s.

On$e #t rea$hes the en,o,er'a $e s the +ater 'o0esThro%"h the $)top as' an, 0a$%o es #nstea, o! the

Ce +a s.

The root ha#r $e #s no+ h)poton#$ to the a,;a$ent $e s.

bio form 5 - transportation.ppt

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