Darwin nrhiav tau dab tsi txog cov nroj tsuag los ntawm nws qhov kev sim Phototropism?
Darwin nrhiav tau dab tsi txog cov nroj tsuag los ntawm nws qhov kev sim Phototropism?

Video: Darwin nrhiav tau dab tsi txog cov nroj tsuag los ntawm nws qhov kev sim Phototropism?

Video: Darwin nrhiav tau dab tsi txog cov nroj tsuag los ntawm nws qhov kev sim Phototropism?
Video: Цис тау юав кой лос цуав нёб коом зос 09.03.2018 2024, Kaum ib hlis
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Phototropism - Kev sim . Ib txhia ntawm tus thaum ntxov kev sim phototropism tau ua los ntawm Charles Darwin (zoo tshaj plaws rau nws kev koom tes rau evolutionary theory) thiab nws tus tub. Nws pom tias yog lub teeb ci tuaj a coleoptile (tua taub hau) los ntawm ib sab tus tua khoov (loj hlob) mus rau tus teeb.

Yog li ntawd, Darwin nrhiav tau dab tsi txog cov nroj tsuag hauv nws qhov kev sim hauv 1880s?

Cov Darwin Experiments Charles Darwin thiab nws tus tub Francis nrhiav pom (hauv 1880) tias qhov kev txhawb nqa phototropic raug kuaj pom ntawm qhov kawg ntawm cog . Cov Darwins siv cov nyom nyom rau qee qhov lawv cov kev sim . Thaum cov yub tau loj hlob saum npoo av, cov coleoptile nres loj hlob thiab thawj nplooj pierces nws.

Tom qab, lo lus nug yog, dab tsi mus sim? Frits Tau mus auxin ua kev sim . Animation qhia cov kev sim nqa tawm hauv 1928 los ntawm Dutch biologist Frits Warmolt mus (1903-1990) los qhia txog lub neej thiab cov teebmeem ntawm kev loj hlob hormone auxin hauv cov nroj tsuag. Nws tau sim nrog cov tub ntxhais hluas tua hauv monocotyledons xws li nyom.

Ntawm no, leej twg nrhiav tau Phototropism?

Charles Darwin

Cov nroj tsuag teb li cas rau kev sim teeb?

Noob thawb me nplooj tawm ntawm hauv av mus rau hauv teeb . Ib lub tsev cog hauv chav tsaus ntuj yuav loj hlob mus rau qhov teeb . Qhov kev txav no hauv teb rau lub teeb hu ua phototropism. Hnub ci txo auxin, yog li cov cheeb tsam ntawm cov cog uas yog raug tshav ntuj yuav muaj auxin tsawg.

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