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Biography
Allan Wilson
Allan Charles Wilson (18 October 1934 – 21 July 1991) was a Professor of Biochemistry at the University of California, Berkeley, a pioneer in the use of molecular approaches to understand evolutionary change and reconstruct phylogenies, and a revolutionary contributor to the study of human evolution. He was one of the most controversial figures in post-war biology; his work attracted a great d
  • 702
  • 18 Nov 2022
Topic Review
Allan-Herndon-Dudley Syndrome
Allan-Herndon-Dudley syndrome is a rare disorder of brain development that causes moderate to severe intellectual disability and problems with movement. This condition, which occurs exclusively in males, disrupts development from before birth. Although affected males have impaired speech and a limited ability to communicate, they seem to enjoy interaction with other people.
  • 659
  • 24 Dec 2020
Topic Review
Allelic Variations within Vrn-Genes at Different Ploidy Levels
Rapid climate changes, with higher warming rates during winter and spring seasons, dramatically affect the vernalization requirements, one of the most critical processes for the induction of wheat reproductive growth, with severe consequences on flowering time, grain filling, and grain yield. Specifically, the Vrn genes play a major role in the transition from vegetative to reproductive growth in wheat. Recent advances in wheat genomics have significantly improved the understanding of the molecular mechanisms of Vrn genes (Vrn-1, Vrn-2, Vrn-3, and Vrn-4), unveiling a diverse array of natural allelic variations.
  • 107
  • 27 Feb 2024
Topic Review
Allelochemicals from Microalgae
Allelochemicals are toxic secondary metabolites produced by plants, microalgae, bacteria, and fungi that influence other organisms. The bioactivity of allelochemicals and their toxic or beneficial effects have been the focus of research in medicine and agriculture, and for their anticancer and antimicrobial properties. Microalgae are the source of a remarkable diversity of biologically active compounds, which can be involved in allelopathic interactions. The main chemical classes of microalgal allelochemicals are alkaloids, fatty acids and derivatives, polyketides, peptides, phenolics, and terpenoids. In the environment, these molecules are secreted by microalgae for communication, defence, and adaptation purposes.
  • 365
  • 17 May 2023
Topic Review
Allelopathy
Allelopathy is an ecological phenomenon in which organisms interfere with each other. As a management strategy in agricultural systems, allelopathy can be mainly used to control weeds, resist pests, and disease and improve the interaction of soil nutrition and microorganisms. Volatile organic compounds (VOCs) are allelochemicals volatilized from plants and have been widely demonstrated to have different ecological functions.
  • 5.0K
  • 09 Sep 2021
Topic Review
Allelopathy and Allelochemicals of Leucaenaleucocephala
Leucaena leucocephala (Lam.) de Wit is native to southern Mexico and Central America and is now naturalized in more than 130 countries. The spread of L. leucocephala is probably due to its multipurpose use such as fodder, timber, paper pulp, shade trees, and soil amendment. However, the species is listed in the world’s 100 worst invasive alien species, and an aggressive colonizer. It forms dense monospecific stands and threatens native plant communities, especially in oceanic islands. Phytotoxic chemical interactions such as allelopathy have been reported to play an important role in the invasion of several invasive plant species.
  • 491
  • 04 Jul 2022
Topic Review
Allelopathy in Grasslands and Forests
Plants can produce and release allelochemicals to interfere with the establishment and growth of conspecific and interspecific plants. Such allelopathy is an important mediator among plant species in natural and managed ecosystems.
  • 347
  • 07 Apr 2023
Topic Review
Allelopathy of Knotweeds as Invasive Plants
Perennial herbaceous Fallopia is native to East Asia, and was introduced to Europe and North America in the 19th century as an ornamental plant. Fallopia has been spreading quickly and has naturalized in many countries. It is listed in the world’s 100 worst alien species. Fallopia often forms dense monospecies stands through the interruption of the regeneration process of indigenous plant species. Allelopathy of Japanese knotweed (Fallopia japonica), giant knotweed (Fallopia sachalinensis), and Bohemian knotweed (Fallopia x bohemica) has been reported to play an essential role in its invasion. The exudate from their roots and/or rhizomes, and their plant residues inhibited the germination and growth of some other plant species. These knotweeds, which are non-mycorrhizal plants, also suppressed the abundance and species richness of arbuscular mycorrhizal fungi (AMF) in the rhizosphere soil. Such suppression was critical for most territorial plants to form the mutualism with AMF, which enhances the nutrient and water uptake, and the tolerance against pathogens and stress conditions.
  • 532
  • 31 Dec 2021
Topic Review
Allelopathy of S. canadensis
Solidago canadensis L. is native to North America and have naturalized many other continents including Europa and Asia. Their species is an aggressive colonizer and forms thick monospecific stands. Allelopathy is the chemical interaction between donor plants and recipient plants through allelochemicals. Allelochemicals are produced in some plant parts and released into the vicinity of the donor plants, including their rhizosphere soil either by the root exudation, rainfall leachates, volatilization from the plant parts or decomposition processes of plant residues.
  • 434
  • 07 Dec 2022
Biography
Allen V. Astin
Allen Varley Astin (June 12, 1904 – January 28, 1984) was an American physicist who served as director of the United States National Bureau of Standards (now the National Institute of Standards and Technology) from 1951 until 1969. During the Second World War he worked on the proximity fuse. He was an advocate for introduction of metric weights and measures to the United States.[1] Allen As
  • 397
  • 15 Dec 2022
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