Listopad - abin da yake da shi? A Sanadin da kuma muhimmancin da sabon abu

Listopad ... Mene ne abu ya faru a kowace fall, kowa ya san. Kuma shi ya sa itatuwa rasa su zaba? Amsar wannan tambaya za a iya samu a cikin labarin.

Mene ne leaf?

Game da Listopad akwai ko da wani hikaya. An shaidawa cewa a gaban dukan tsire-tsire sun Evergreen. Da zarar sanyi weather, da dukan dabbobi tafi a warmer climes. Kuma kawai kadan tsuntsu tare da wani rauni da reshe ba zai iya ba da shi. Tambaya ga taimako, ta juya zuwa ga itatuwa. Amma sai suka kasance ma aiki. Kawai spruce kuma Pine ba ba ta tsari daga sanyi a rassan. A Juniper berries bi. Kamar yadda wata azãba, Frost gaya iska rushe da hunturu da ganyen itatuwan sha'aninsu dabam.

The sabon abu, wanda muka duba, ko da yaushe wata ãyã daga cikin gabatowa sanyi weather. Wannan shafi kawai ga shuke-shuke da girma a cikin temperate zone tare da jinsin yanayi. Duk da haka, wakilan da wurare masu zafi da mulki kuma zubar da ganye. Yana yawanci ya faru kafin fari.

Mene ne leaf? Wannan cyclical sabon abu a cikin rayuwar shuke-shuke. Yana iya zama saboda wani iri-iri m yanayi, ban da sanyi da fari. Alal misali, yana iya nuna wani inji gazawar, da shan kashi na wani kwayar cutar ko yanayi da gubobi. Saboda haka, faduwa na ganye - m dauki na wani shuka.

Sanadin leaf fall

Saboda haka, don me bã shuke-shuke da lokaci zuwa lokaci, canza su kore tufafin da kuma abin da metamorphosis bi wannan tsari? Kafin ka fara fadowa ganye, ganye ko da yaushe canza su launi. Wannan shi ne saboda plastid canji. Chloroplast dauke da wani pigment kira chlorophyll da ta sa ganye kore. A cikinsu akwai aiwatar da photosynthesis, daya daga cikin yanayi ne gaban ruwa.

Bayan da ya faru na unfavorable yanayi a gindi takardar da aka kafa toshe. Yana impedes da ya kwarara daga ruwa a cikin takardar. Photosynthesis zama ba zai yiwu ba, don haka da cewa chlorophyll da aka hallaka. Amma wasu pigments fara bayyana, da kuma ganye juya ja, yellow, orange ko m launi. Bishiyoyi da shrubs son canza su kaya.

Cork nama located a tushe lamina, sa shi m wuri. Ko kadan iska zai iya sa da zangarniya kashe kara.

deciduous

Kuma abin da yake a leaf cikin sharuddan Physiology? Yana da wani zama dole kariya a kan wuce kima asarar danshi. Tun da surface na ganye ruwa ne tushen transpiration, da shuka ne kawai yin kawar da shi. Ruwa ne sosai da muhimmanci ga shuka to fuskanci sanyi lokaci, don haka rasa shi bai sa hankali.

Kusan duk angiosperms ne deciduous. Amma akwai ban. Ga misali, shrubs cranberries, Rosemary, Heather ganye zama. Don yin wannan, suna da wasu na'urorin don kare da ruwa hasãra. Saboda haka, a kan underside na ganye cranberries ne kananan dimples, da ganuwar wanda dauke da mucous abu da garwaya da ruwa. A danshin ruwa daga Rosemary hana muhimmanci mai. Sun cika musamman motsa a cikin ganye da wannan shuka.

Evergreen

Amma akwai tsire-tsire, wanda ba su sani ba abin da wani ganye. Wadannan sun hada da kusan dukkan wakilan da Sashen Gymnosperms. "A hunturu da kuma bazara - daya launi" - wannan saba wa duk daga yara, da tatsuniya ne game da su. gymnosperms ganye kira needles. Su ne sosai kunkuntar, don haka da danshin ruwa daga surface dan kadan.

Its foliage Evergreen itatuwa rasa kawai da har na tsufa. A kan talakawan, yana daukan wuri a cikin 4-5 shekaru. Kuma spinalis Pine needles iya aiki fiye da 40 shekara. The kawai gymnosperms, wanda ya musanya ta rufe lokacin canza yanayi ne mai larch.

Saboda haka, ganye ne mai nazarin halittu aiwatar da cewa shi ne na bayar da muhimmanci a cikin kariya da shuka rayuwa. Yana za a iya hade da canji na yanayi, da kuma lalace gabobin ko na illa lokaci.