فرهنگ مصور گیاهشناسی
- شروع کننده موضوع * ziba *
- تاریخ شروع
anisotropic
داشتن خواص مختلف در طول محور های مختلف از نظر نوری . داشتن خواص نوری متفاوت که نشان دهنده ی انکسار مضاعف است .
anomocytic
نوع خاصی از ترتیب سلولهای محافظ روزنه و دیگر سلولهای اپیدرمی مماس با آنها ( اگر سلولهاي همراه اطراف سلولهاي محافظ يك شكل و يكسان بوده كه ميتوان گفت فاقد سلول همـراه هستند ، نوع روزنه ، آنمـوستيك (Anomocytic) ميباشد كه در گونه هاي آلاله ، شمعداني ، پنيرك ، گل ميمون ، خشخاش ، كدو ، ختمي ، گز و . . . مشاهده ميشود ) .
داشتن خواص مختلف در طول محور های مختلف از نظر نوری . داشتن خواص نوری متفاوت که نشان دهنده ی انکسار مضاعف است .
anomocytic
نوع خاصی از ترتیب سلولهای محافظ روزنه و دیگر سلولهای اپیدرمی مماس با آنها ( اگر سلولهاي همراه اطراف سلولهاي محافظ يك شكل و يكسان بوده كه ميتوان گفت فاقد سلول همـراه هستند ، نوع روزنه ، آنمـوستيك (Anomocytic) ميباشد كه در گونه هاي آلاله ، شمعداني ، پنيرك ، گل ميمون ، خشخاش ، كدو ، ختمي ، گز و . . . مشاهده ميشود ) .
aperture : ( دانه گرده ) ، یک ناحیه ی فشرده با شکل خاص در دیواره گرده ، که لوله گرده از طریق این منطقه خارج میشود .
(A–C) Pollen tetrad in quartet strain. Pollen grains are three aperturate – each of the three apertures of a pollen grain is associated with an aperture of another pollen grain. Apertures of a pollen grain are in contact with apertures of the three other pollen grains. Tetrads are tetrahedral. (C-b) Scheme of the tetrad shown in (C-a); big circles represent the microspores, triangles represent apertures. (D–F) Pollen tetrad in quartet-tam strain. Three aperturate pollen grains are associated two by two within the tetrad. All the three apertures of a pollen grain are associated with the three apertures of only one another pollen grain. (D) Tetragonal tetrad. (E) Tetragonal tetrad showing a pollen grain with an abnormal aperture (the upper right). (F-a, -b, -c) Different focal planes on a decussate tetrad; arrows show apertures. (F-d) Scheme of the tetrad shown in (F-a, -b, -c), big circles represent the microspores; black bars represent apertures that are seen by looking from the view of the tetrad in (F-a); grey ones those which are hidden. (A), (D) and (E) are scanning electron micrographs; (B), (C) and (F) are stained with aniline blue. Scale bars = 10 µm.
SEM micrographs of pollen grains of Menthinae. a–f Variation of pollen shape in the equatorial view. g–l Polar view with variations of shape and aperture number. a Oblate pollen grain with elliptic outline of Micromeria marginata. Suboblate pollen grain, bMonarda fistulosa, cZiziphora clinopodioides. d Oblatespheroidal pollen grain with circular outline, Glechon marifolia. Monardella odoratissima, e oblate spheroidal pollen, h circular outline. f Subprolate pollen grain of Cyclotrichium origanifolium. g Pentacolpate pollen grain of Pycnanthemum incanum. Hexacolpate pollen grain with circular shape, hMonardella odoratissima, iSaccocalyx satureioides, jBlephilia ciliata. Hexacolpate pollen grain with elliptic shape, kConradina canescens, lHyssopus officinalis
(A–C) Pollen tetrad in quartet strain. Pollen grains are three aperturate – each of the three apertures of a pollen grain is associated with an aperture of another pollen grain. Apertures of a pollen grain are in contact with apertures of the three other pollen grains. Tetrads are tetrahedral. (C-b) Scheme of the tetrad shown in (C-a); big circles represent the microspores, triangles represent apertures. (D–F) Pollen tetrad in quartet-tam strain. Three aperturate pollen grains are associated two by two within the tetrad. All the three apertures of a pollen grain are associated with the three apertures of only one another pollen grain. (D) Tetragonal tetrad. (E) Tetragonal tetrad showing a pollen grain with an abnormal aperture (the upper right). (F-a, -b, -c) Different focal planes on a decussate tetrad; arrows show apertures. (F-d) Scheme of the tetrad shown in (F-a, -b, -c), big circles represent the microspores; black bars represent apertures that are seen by looking from the view of the tetrad in (F-a); grey ones those which are hidden. (A), (D) and (E) are scanning electron micrographs; (B), (C) and (F) are stained with aniline blue. Scale bars = 10 µm.
SEM micrographs of pollen grains of Menthinae. a–f Variation of pollen shape in the equatorial view. g–l Polar view with variations of shape and aperture number. a Oblate pollen grain with elliptic outline of Micromeria marginata. Suboblate pollen grain, bMonarda fistulosa, cZiziphora clinopodioides. d Oblatespheroidal pollen grain with circular outline, Glechon marifolia. Monardella odoratissima, e oblate spheroidal pollen, h circular outline. f Subprolate pollen grain of Cyclotrichium origanifolium. g Pentacolpate pollen grain of Pycnanthemum incanum. Hexacolpate pollen grain with circular shape, hMonardella odoratissima, iSaccocalyx satureioides, jBlephilia ciliata. Hexacolpate pollen grain with elliptic shape, kConradina canescens, lHyssopus officinalis
Similar threads
| Thread starter | عنوان | تالار | پاسخ ها | تاریخ |
|---|---|---|---|---|
|
معرفی باغ های گیاهشناسی ایران | علوم گیاهی | 10 | |
|
|
بررسی سوال های کارشناسی ارشد(گیاهشناسی) | علوم گیاهی | 2 |