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For more information: http://www.7activestudio.com info@7activestudio.com http://www.7activemedical.com/ info@7activemedical.com http://www.sciencetuts.com/ 7activestudio@gmail.com Contact: +91- 9700061777, 040-64501777 / 65864777 7 Active Technology Solutions Pvt.Ltd. is an educational 3D digital content provider for K-12. We also customise the content as per your requirement for companies platform providers colleges etc . 7 Active driving force "The Joy of Happy Learning" -- is what makes difference from other digital content providers. We consider Student needs, Lecturer needs and College needs in designing the 3D & 2D Animated Video Lectures. We are carrying a huge 3D Digital Library ready to use. AESTIVATION: The mode of arrangement of perianth lobes in bud condition is called 'ASETIVATION'. It is of different types: 1. Valvate aestivation. 2. Twisted, 3. Ascendingly Imbricate, 4. Descendingly Imbricate (Vexillary) and 5. Quincuncial aestivation. Let us study them one by one. VALVATE AESTIVATION: Perianth lobes are arranged closely with small gaps between them. Example:Calyx of Hibiscus. TWISTED AESTIVATION: Perianth lobes overlap one another, in which one margin of one perianth lobe is covered by the margin of another perianth lobe. All perianth lobes has one margin inside and one margin outside. Examples:Corolla of Datura, Hibiscus. ASCENDINGLY IMBRICATE AESTIVATION: Each perianth lobe overlaps the perianth lobes present posterior to it. The overlapping of perianth lobes appear in postero-anterior direction In this one perinath lobe is completly present outside, and one perianth lobe is present completely inside. The remaining three has one margin inside and one margin outside. It is called 1+1+ 3 arrangement. Example:Corolla of Caesalpiniaceae. DESCENDINGLY IMBRICATE AESTIVATION: Each perianth lobe covers the perianth lobe present anterior to it.The overlapping of perianth lobes appear in postero anterior direction. Example:Corolla of Fabaceae--called Papilionaceous corolla. QUINCUNCIAL AESTIVATION: It is also a twisted type of aestivation. It shows five perianth lobes, in which two are present completely outside, two are present completely inside, fifthperianth member has one margin inside and one margin outside. The perianth lobes appear in 2+2+1 manner. Example:Calyx of Ipomea, Catharanthus.
