Phyllotaxis - Wikipedia
In botany, phyllotaxis (from Ancient Greek φύλλον (phúllon) 'leaf' and τάξις (táxis) 'arrangement') [1] or phyllotaxy is the arrangement of leaves on a plant stem. Phyllotactic spirals form a distinctive class of patterns in nature .
Phyllotaxy (Arrangement of Leaves): Cyclic and Spinal Phyllotaxy
Phyllotaxy is the mode of arrangement of leaves on the stem. It is surprising how regular and strictly mathematical this is. There is a definite law according to which the leaves are arranged on the stem of a particular species. The arrangement is always regular and leaves are never placed on the stem in a haphazard manner.
Phyllotaxis: Current Biology - Cell Press
2017年9月11日 · Leaves and flowers are arranged in regular patterns around the stem of a plant, a phenomenon known as phyllotaxis. Different arrangements occur, such as distichous, decussate or spiral (Figure 1). Most prevalent in nature are spirals in which the average divergence angles between successive organs are close to 137.5°, the so-called ‘golden angle’.
Phyllotaxis - Phyllotaxis
One central phenomenon in Phyllotaxis is that many plants display numbers of parastichies that are pairs of successive numbers in the Fibonacci sequence: 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, … where, after starting with 1, 1, each number is the sum of the previous two. For instance: 13 = 5 + 8, its two previous elements in the sequence.
The unified rule of phyllotaxis explaining both spiral and non …
Here we propose a unified rule of phyllotaxis to explain both types of arrangement: the developed leaves form vertical rows along the stem. In the non-spiral arrangement, nascent to developed leaves always follow this rule, so that the number of leaf rows is kept constant irrespective of …
Phyllotaxy - PMC - National Center for Biotechnology Information
2007年2月20日 · Phyllotaxy, the arrangement of organs along the stem, has puzzled scientists for centuries. The shoot apical meristem plays a crucial role in the formation of this pattern, by initiating organ primordia on its flanks in a temporally and spatially controlled manner.
Phyllotaxis - an overview | ScienceDirect Topics
Phyllotaxy (Greek phyllon = leaf, taxis = order) describes the regular arrangement of leaves in space or the pattern of lateral organs on the shoot, whereby the points at which the lateral organs connect to the shoot are called nodes.
The lively topic of phyllotaxis is based on ever improving descriptions of two important parameters, the divergent angle and parastichy patterns, along with several minor aspects, including the roles of stem size and leaf primordium diameter. Most theories to explain these features are quite old yet continue to hold botanists’ attention.
Phyllotaxis: from classical knowledge to molecular genetics
2021年2月7日 · Phyllotaxis (phyllotaxy) is the arrangement of repeated plant organs. The word “phyllotaxis” itself was coined by Carl Friedrich Schimper (1830), a botanist and naturalist from Mannheim, Germany. It is a combination of two Greek …
Phyllotaxis: Trends in Plant Science - Cell Press
Phyllotaxis, the regular arrangement of leaves or flowers around a plant stem, is an example of developmental pattern formation and organogenesis. Phyllotaxis is characterized by the divergence angles between the organs, the most common angle being 137.5°, the golden angle.