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ANITHA JAMES

NATURAL SCIENCEROLL.NO - 25

PLANT ROOT

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PLANT ROOT

The root is the non green underground prt o!the p"ntde#e"ope !ro$ the rdi%"e o! the e$&r'o

It is positi#e"' geotropi% ( negti#e"' phototropi%nd positi#e"' h'drotropi%.A t'pi%" gro)ing root hs root %p($eriste$ti% region ( region o! e"ongtion (roothir( region o! $turtion

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*T+,ES O ROOT S+STEMTap root system , fbrous root system,

adventitious root system

TA, ROOT S+STEM It %onsist o! $in root %""ed( tproot or

pri$r' root It is dire%t pro"ongtion o! the rdi%"e

It gro) #erti%""' do)n in to the soi"The "ter" &rn%hes o! tp root is %""ed

"ter" roots

ROOT SYSTEM

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UNCTIONS O THE ROOT S+STEMTo n%hor the p"nt to the soi"To &sor& )ter nd nutrients !ro$ the soi"

Roots get $odied to per!or$ spe%i"!un%tions su%h s respirtion ( $e%hni%"support ( ssi$i"tion ( nd storge o! !ood

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I/ROUS ROOT S+STEMThe rdi%"e !ter short period o! "i!e ( stops

its gro)thSe#er" &er "i0e roots rise !ro$ the &se

o! the p"ntSeen $ost"' in $ono%ots

i&rous roots re thin

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A1ENTITIOUS ROOT S+STEMRoot de#e"op !ro$ n' prt o! the p"nt

&od' other thn root s'ste$The &n'n tree ( $ngro#es re e3$p"e It is short "i#ed not produ%e tp root In so$e %ses it de#e"op !ro$ the petio"e o!

the "e! nd these re %""ed !o"ir roots

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Root is s)o""en in the $idd"e nd tperin tthe tip nd &se is %""ed !usi!or$ root

Root &e%o$e s)o""en spheri%""' t the

upper end nd tpering to)rds "o)er prtis %""ed npi!or$ rootRoot is thi%0 nd 4esh' &ut dose not h#e

denite shpe %""ed tu&erous root

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MO1IICATIOHN O THE TA, ROOTSTp roots re $odied !or the storge o!

reser#e !ood $teri"s ( root tu&ers

1epending on the shpe root tu&ers re%"ssied in to !our groupsThe' &re %oni%"( !usi!or$ ( npi!or$( nd

turerous

Root &e%o$e s)o""en t the top nd tpersto)rds the "o)er end %""ed %oni%" root

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NA,IORM

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TU/EROUS ROOT

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CONICAL ROOT

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USIORM ROOT

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THANK YO

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I/ROUS ROOT S+STEM

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A1ENTITIOUS ROOT S+STEM