Leucoplasts umsebenzi. leucoplasts Avilable

Omunye kuyizimpawu abamele umbuso plant khona ezitokisini zabo izakhiwo ezikhethekile - plastids. Bahlanganisa chloroplast, chromoplasts futhi leucoplasts, isakhiwo kanye nemisebenzi iluphi okuzoxoxwa ngalo esihlokweni sethu.

Uyini plastids

Organelles ngokuthi plastids zezitshalo amaseli, isikhunta futhi abanye lenyama. Lokhu ithole imikiswe amajamo akheke lulwimi ezizimele. Bayakwazi interconvert komunye nomunye. Ngokwesibonelo, leucoplasts, isakhiwo kanye nemisebenzi lapho ushintsho bedle elangeni aguqulwa ku chloroplast. Abaningi baye baqaphela ukuthi amazambane nezilimo eziyizigaxa zeleneeyut. Lona ngumphumela unesandla ezinguqukweni ezimangalisayo enjalo. Kodwa ukusebenzisa umkhiqizo anjalo ukudla akuyona zinkulu. Bekanye chloroplast e nezilimo eziyizigaxa egcinwe ushevu - the solanine alkaloid. Kungabangela ukudla ezinzima ubuthi futhi kuyingozi ikakhulukazi ezinganeni.

Phakathi yokuvuthwa izithelo nemifino futhi kwenzeka interconversion ka plastids. Kuphela kuleli cala akhiwa leucoplasts chromoplasts ekutholeni umbala ezingxenyeni ezihlukahlukene isitshalo: ophuzi, obomvu, ezibomvana, ezinsomi, nokunye ..

izinhlobo plastids

Leucoplasts plastids chromoplasts, chloroplast kuhluke kokubili isakhiwo kanye nemisebenzi eyenziwa. Kodwa zonke zidlala indima ebalulekile futhi Irreplaceable. Ikhono lidlulisele umbala ezingxenyeni ezihlukahlukene isitshalo ngenxa yokuthi chromoplasts aqukethe zombala ahlukahlukene - colorants.

Corolla amacembe eliqhakazile izitshalo eziningi - ubufakazi ejwayelekile kwalowo. umbala okunjalo izimbali iphunga ihehe izinambuzane impova kanye kokukhulelwa obulandela kumiswa izithelo.

plastids Green aqukethe chlorophyll, ebheka umbala waso. Ukuba khona kwale nto (kanye carbon dioxide, amanzi nokukhanya kwelanga) luyimfuneko ukugeleza yenqubo ye-photosynthesis. Ngokuhamba yayo izitshalo zibe ukudla okumahhadla nomoya-mpilo. Eyokuqala ngabo umthombo okunomsoco, ukukhula kanye nokuthuthuka. A-mpilo igesi zonke izidalwa eziphilayo, namagciwane ukuze abantu, okusetshenziselwa ukuphefumula.

isakhiwo leucoplasts

Leucoplasts kukhona organelles kungekho nto enemibala emihle. Sinenkosi simise eyindilinga. ulwelwesi uhlelo athuthukile kunalokho wavuma. Ukuma ziyahlukahluka phezu okungalungile kuphela lapho ephambi cytoplasm zabo ziqala ukwakha isitashi okusanhlamvu ngokwanele ezinkulu. Leucoplasts plastids eziqukethwe Stocking eyinhloko izicubu isitshalo. It wakha isisekelo zokuguqulwa ihlumela - nezilimo eziyizigaxa, ama, rhizomes. leucoplasts umsebenzi futhi kuchazwe izici ezifana isakhiwo sabo. Kulezi organelles ingaphakathi zinganqwabelana izakhi eziningi ezibalulekile. Leucoplasts njengoba zonke plastids kukhona organelles dvuhmembrannymi. Kodwa, igobolondo le kwangaphakathi ingeyona ziboya abahlukene ngaphakathi isakhiwo.

Leucoplasts - amaseli eukaryotic. Lokhu kusho ukuthi ama-molecule awo cytoplasm DNA zinokwaziswa zofuzo eziqukethwe core ahlotshiswa.

leucoplasts umsebenzi

Lezi plastids kukhona ezikhethekile. Kuye ngohlobo, ayakwazi buthelela futhi synthesize izinhlobo ezihlukahlukene izinto eziningi eziphilayo. Ngokwesibonelo, ama-carbohydrate isitashi aqukethe amyloplasts. Lokhu kwaziswa kuyinto ejwayelekile zonke izitshalo, njengoba kwakhiwa kusukela glucose, etholwe ye-photosynthesis. umkhiqizo Oleoplasty kanye nokugcina amafutha. amafutha Liquid atholakala amanye amaseli isitshalo futhi abizwa ngokuthi amafutha. Proteinoplast aqukethe amaprotheni. Ubangela umsebenzi sinjalo leucoplasts isakhiwo. Ngaphezu kwalokho ingaphakathi adingekayo isitokwe futhi isitoreji izinto ezihlukahlukene ziqukethe enzyme. Lezi yelikhono begazi bayakwazi ukusheshisa zemvelo zamakhemikhali ukusabela, kodwa akuzona ingxenye imikhiqizo yabo. Ngaphansi kwethonya, isibonelo, bakha elula carbohydrate glucose polysaccharide isitashi is. Lapho kuphakama izimo okuyizinto okungekuhle ukugeleza ye-photosynthesis, waphinde wajinge wanamatsela ukuba monomers futhi wasebenzisa ukuphila isitshalo izinqubo.

Ukuphi leucoplasts

Njengoba umsebenzi oyinhloko leucoplasts - ukunqwabelana izinto, lezi organelles eziqukethwe izingxenye uqweqwe bese esinamanzi izitshalo. Ikakhulukazi ocebile amazambane nezilimo eziyizigaxa. umfundi ngamunye akwazi ukuqhuba ukuphendula qualitative ukuze isitashi ukuthi kuqukethwe leucoplasts yayo. Ukuze wenze lokhu, nje kudingeka sigqoke nocezu fresh amaconsi ambalwa isixazululo iodine. Ngaphansi kwethonya lawo kuze kube plastids kungekho nto enemibala emihle zithole umbala ocebile onsomi. Bona kungabonwa ngaphansi ngesibonakhulu ngisho at kokukhulisa ongaphakeme.

Isibani zalesi sihlahla nazo leucoplasts eziningi. Ngenxa supply elikhulu lamanzi kanye carbohydrate izimpande ezinjalo bayakwazi uthuthe nezikhathi komhlaba okungekuhle nesomiso, isithwathwa nokushisa. Ngesikhathi esifanayo aphakeme ingxenye encane isitshalo efa yokuphunyuka Ushintshe uhlala iphila. Ngokwesibonelo, Tulips e amaviki ambalwa sikhathi ukuze ukhulise futhi ottsvesti. Bese e isibani yabo buthelela carbohydrate imiswe phakathi photosynthesis izingxenye oluhlaza izitshalo entwasahlobo.

Abayona ngaphandle futhi rhizomes. Wonke umuntu uyazi ukuthi ukuqeda ukhula kunzima kangakanani. Abekho ngisho wesabe isomiso esinzima, amaqabunga avele ngaphezu komhlabathi. Into wukuthi simila ngokwaso eba ngaphansi komhlaba ngesimo a uqweqwe yokuphunyuka Ushintshe ne internodes side. Uqukethe abalulekile lemali leucoplasts, futhi kungakho supply izinto.

I endosperm imbewu, ezinhlamvu fungal, ova izitshalo ephakeme enze imisebenzi yawo kungenxa yokuba khona idatha plastids.

Umsuka leucoplasts

Ukuba khona leucoplasts namanje nezicubu embryonic zezitshalo eziphilayo ingaphelele. Futhi kwakheka proplastids okuthiwa. Letakhi kukhona kokumethemba zonke lezi organelles. Babeqale zitholakala meristem - yetemfundvo Indwangu izitshalo. Proplastids corpuscles kukhona ezincane ngobukhulu engafinyelela kwengu-1 Micron. Yilokho sonke chain of the interconversion kula maseli organel isitshalo iqala kubo.

Ngakho, umsebenzi oyinhloko leucoplasts zamagama, ekuqongeleleni kanye isitoreji izinhlobo ezahlukene izinto eziphilayo kunesidingo sokuba khona izinto eziphilayo.