File:57. Прости скробни зрнца на млечка (Euphorbia milii).ogv
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Description57. Прости скробни зрнца на млечка (Euphorbia milii).ogv |
English: Simple starch grains in milky sap in crown of thorns (Euphorbia milii) under microscope
During the process of photosynthesis in plants, sugars are created in the form of starch. Those sugars are stored in the leukoplasts in the cells and form starch grains. For the preparation of this slide, we use the milky sap of a spurge. Leaves are torn off the branch and a cut is made on the branch itself, from which the milky sap is squeezed onto the object glass. Two drops of water are placed on the object glass, one central larger and one peripheral smaller. A cover glass is placed on it, which is lowered next to the peripheral drop of water and at an angle of 45° it moves towards the middle of the object glass until the moment when the two drops of water merge, during which it is lowered. In this way, the native microscopic slide is prepared and it is ready for microscopy. The simple starch grains in milky sap are of the concentric type, because the hilum is placed in the middle of the starch grain. For this starch grains is specific that they have the shape of bones. Prepared and performed by Sara Cvetanoska, Institute of Biology, FNSM, Ss. Cyril and Methodius University, Skopje, Macedonia.Македонски: Прости скробни зрна во млечен сок кај млечка (Euphorbia milii) под микроскоп
При постапката на фотосинтеза кај растенијата се создаваат шеќери во облик на скроб. Тие шеќери се складираат во леукопластите во клетките и образуваат скробни зрна. За подготовка на овој препарат користен е млечен сок од гранче на млечка. Се откинуваат листови од гранчето и се прави пресек на самото гранче од кој се истиснува млечниот сок врз предметното стакленце. На предметното стакленце се ставаат две капки вода, една средишна поголема и една странична помала капка вода. Се става покровно стакленце кое се спушта покрај страничната капка со вода и под агол од 45° се движи кон средината на предметното стакленце се до моментот кога ќе се спојат двете капки со вода, при што се спушта. На овој начин е подготвен нативниот микроскопски препарат и истиот е спремен за микроскопирање. Во видното поле се гледаат простите скробни зрна на вкупно зголемување од 400 пати. Простите скробни зрна кај млечката се од концентричен тип, бидејќи хилумот е поставен во средината на скробното зрно. Специфично за нив е тоа што имаат облик на коски. Подготвено и изведено од Сара Цветаноска, Институт за биологија, ПМФ, УКИМ, Скопје. |
Date | |
Source | Own work |
Author | Deni Ingilizovski |
This biology experiment video was made within the Wikiexperiments 2022 set up by Shared Knowledge.
You can see all the videos in the category Biology Wikiexperiments. English | македонски | +/− |
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