Rolf Sattler FLS FRSC (born March 8, 1936) is a Canadian plant morphologist, biologist, philosopher, and educator. He is considered one of the most significant contributors to the field of plant morphology [1] and "one of the foremost plant morphologists in the world." [2] His contributions are not only empirical but involved also a revision of the most fundamental concepts, theories, and philosophical assumptions. He published the award-winning Organogenesis of Flowers (1973) and nearly a hundred scientific papers, mainly on plant morphology. As well he has contributed to many national and international symposia and also organized and chaired symposia at international congresses, edited the proceedings of two of them and published them as books. [3] [4]
Besides Biophilosophy (1986), his philosophical contributions include articles on complementarity (perspectivism), process philosophy, the mandala principle, and the convergence of science and spirituality. Additional publications deal with holistic alternative medicine and healing ways of thinking such as fuzzy logic, Yin-Yang thinking (both/and logic), and Buddhist and Jain logic.
Sattler was born in Göppingen, Germany. He studied botany, zoology, chemistry, philosophy and pedagogy in Germany, Austria, and Switzerland. He received his doctorate, with summa cum laude, in systematic botany from the University of Munich. As a postdoctoral fellow, he spent a year with Ludwig von Bertalanffy, one of the founders of general systems theory, at the University of Alberta in Canada. Subsequently, he worked for another year with Ernest M. Gifford and G. Ledyard Stebbins at the University of California. For 33 years, he was first assistant, then associate, and finally full professor in the departments of botany and biology of McGill University in Montreal. He became Emeritus Professor when he retired in 1997. Since retiring he has lived in Kingston, Ontario.
At McGill University he taught botany, biology, the history and philosophy of biology, and biology in relation to the human predicament. As a visiting professor at the University of Berlin in Germany he taught plant morphology and the philosophy of biology. At Cornell University, he was a consultant in the Summer Institute on the Philosophy of Biology. And at Naropa Institute he taught a summer course on Modern Biology and Zen.
Sattler has lectured at many universities across the globe, including Harvard and the Universities of California, Paris, Berlin, Bonn, Heidelberg, Zurich, Delhi, Malaya, and Singapore.
As well as his research in plant morphology and the philosophy of biology, he has investigated the relation of science and spirituality. He is keenly interested in holistic alternative medicine and healing thinking. He is also interested in developing a process language in which the verb, not the noun or pronoun, plays the primary role.
In 1995, he gave a talk on science and spirituality in a symposium at the 60th birthday celebrations of the Dalai Lama. There he discussed the relation between science and spirituality with special reference to life science. [5]
Sattler's contributions to plant morphology include the empirical, conceptual, theoretical, and philosophical. Together with his coworkers he has contributed a wealth of empirical data on shoot and leaf development [6] and flower development. [7] [8]
His empirical findings led him to revision fundamental concepts of comparative morphology. He emphasized that the concepts of homology and homeosis (replacement) should also include partial homology, partial homeosis, and quantitative homology. [9] These revisions led him to question the theoretical and philosophical foundations of comparative morphology. In contrast to mainstream morphology, which tends to be categorical, he provided evidence for a continuum morphology. [10] [11] Together with Bernard Jeune, he demonstrated mathematically a continuum of plant forms that spans not only organ categories such as root, stem, and leaf, but also different hierarchical levels of organ systems, organs, and tissues. [12] Rutishauser and Isler regard him as one of the major contemporary proponents of continuum morphology (or Fuzzy Arberian Morphology: FAM). [13]
Furthermore, he developed a dynamic morphology or process morphology that supersedes the structure/process dualism inherent in almost all biological research. [14] According to process morphology, structures do not have process(es), they are process(es). He used principal component analysis and the concept of morphological distance to provide a dynamic approach to structure as process, [15] This approach has placed comparative morphology on a more objective plane [16]
The major focus of his philosophical contributions to plant morphology and our understanding of reality has been on process philosophy, integral philosophy, holism, contextualism, perspectivism, and complementarity. Besides hierarchy (holarchy), he underlines the importance of complementary perspectives such as holism as undivided wholeness, Yin-Yang, continuum and network views. [17] Besides Aristotelian either/or logic, he emphasizes the importance of fuzzy logic. He explores how either/or logic can lead to conflict and even war, whereas fuzzy logic and Yin-Yang thinking can be healing because they connect what either/or logic has torn apart. [18] Finally, he also emphasizes that beyond all perspectives is the unnamable source, emptiness (in the Buddhist sense), mystery, which is of ultimate importance for healing and total Being. [19]
Using a mandala, he presented a synthesis of his scientific, philosophical, and spiritual insights in his open book ‘’Wholeness, Fragmentation, and the Unnamable: Holism, Materialism, and Mysticism – A Mandala’’ (see below in Bibliography). This book also contains two extensive appendices, one on ‘’The Human Condition and its Transcendence’’, and another on ‘’Lessons from the 20th Century for the 21st Century’’.
Sattler is a Fellow of the Linnean Society of London and a Fellow of the Royal Society of Canada. In 1974 he was awarded the Lawson Medal (the highest award of the Canadian Botanical Association) for his book Organogenesis of Flowers.
In 1995 he received an honorary doctorate (D.Sc.) from the Open International University at Colombo, Sri Lanka for his contributions to complementary alternative medicine.
A symposium was dedicated to him on the occasion of his retirement. [20]
Botany, also called plant science, plant biology or phytology, is the science of plant life and a branch of biology. A botanist, plant scientist or phytologist is a scientist who specialises in this field. The term "botany" comes from the Ancient Greek word βοτάνη meaning "pasture", "herbs" "grass", or "fodder"; βοτάνη is in turn derived from βόσκειν, "to feed" or "to graze". Traditionally, botany has also included the study of fungi and algae by mycologists and phycologists respectively, with the study of these three groups of organisms remaining within the sphere of interest of the International Botanical Congress. Nowadays, botanists study approximately 410,000 species of land plants of which some 391,000 species are vascular plants, and approximately 20,000 are bryophytes.
Process philosophy, also ontology of becoming, or processism, is an approach in philosophy that identifies processes, changes, or shifting relationships as the only real experience of everyday living. In opposition to the classical view of change as illusory or accidental, process philosophy posits transient occasions of change or becoming as the only fundamental things of the ordinary everyday real world.
In biology, homology is similarity due to shared ancestry between a pair of structures or genes in different taxa. A common example of homologous structures is the forelimbs of vertebrates, where the wings of bats and birds, the arms of primates, the front flippers of whales, and the forelegs of four-legged vertebrates like dogs and crocodiles are all derived from the same ancestral tetrapod structure. Evolutionary biology explains homologous structures adapted to different purposes as the result of descent with modification from a common ancestor. The term was first applied to biology in a non-evolutionary context by the anatomist Richard Owen in 1843. Homology was later explained by Charles Darwin's theory of evolution in 1859, but had been observed before this, from Aristotle onwards, and it was explicitly analysed by Pierre Belon in 1555.
Holism is the interdisciplinary idea that systems possess properties as wholes apart from the properties of their component parts. The aphorism "The whole is greater than the sum of its parts", typically attributed to Aristotle, is often given as a glib summary of this proposal. The concept of holism can inform the methodology for a broad array of scientific fields and lifestyle practices. When applications of holism are said to reveal properties of a whole system beyond those of its parts, these qualities are referred to as emergent properties of that system. Holism in all contexts is often placed in opposition to reductionism, a dominant notion in the philosophy of science that systems containing parts contain no unique properties beyond those parts. Proponents of holism consider the search for emergent properties within systems to be demonstrative of their perspective.
In evolutionary developmental biology, homeosis is the transformation of one organ into another, arising from mutation in or misexpression of certain developmentally critical genes, specifically homeotic genes. In animals, these developmental genes specifically control the development of organs on their anteroposterior axis. In plants, however, the developmental genes affected by homeosis may control anything from the development of a stamen or petals to the development of chlorophyll. Homeosis may be caused by mutations in Hox genes, found in animals, or others such as the MADS-box family in plants. Homeosis is a characteristic that has helped insects become as successful and diverse as they are.
Organicism is the philosophical position that states that the universe and its various parts ought to be considered alive and naturally ordered, much like a living organism. Vital to the position is the idea that organicistic elements are not dormant "things" per se but rather dynamic components in a comprehensive system that is, as a whole, everchanging. Organicism is related to but remains distinct from holism insofar as it prefigures holism; while the latter concept is applied more broadly to universal part-whole interconnections such as in anthropology and sociology, the former is traditionally applied only in philosophy and biology. Furthermore, organicism is incongruous with reductionism because of organicism's consideration of "both bottom-up and top-down causation." Regarded as a fundamental tenet in natural philosophy, organicism has remained a vital current in modern thought, alongside both reductionism and mechanism, that has guided scientific inquiry since the early 17th century.
Holism in science, holistic science, or methodological holism is an approach to research that emphasizes the study of complex systems. Systems are approached as coherent wholes whose component parts are best understood in context and in relation to both each other and to the whole. Holism typically stands in contrast with reductionism, which describes systems by dividing them into smaller components in order to understand them through their elemental properties.
Sex, Ecology, Spirituality: The Spirit of Evolution is a 1995 book by American integral theorist Ken Wilber. Wilber intended it to be the first volume of a series called The Kosmos Trilogy, but subsequent volumes were never produced. The book has been both highly acclaimed by some reviewers and harshly criticized by others.
Gynoecium is most commonly used as a collective term for the parts of a flower that produce ovules and ultimately develop into the fruit and seeds. The gynoecium is the innermost whorl of a flower; it consists of pistils and is typically surrounded by the pollen-producing reproductive organs, the stamens, collectively called the androecium. The gynoecium is often referred to as the "female" portion of the flower, although rather than directly producing female gametes, the gynoecium produces megaspores, each of which develops into a female gametophyte which then produces egg cells.
In biology, saltation is a sudden and large mutational change from one generation to the next, potentially causing single-step speciation. This was historically offered as an alternative to Darwinism. Some forms of mutationism were effectively saltationist, implying large discontinuous jumps.
Holistic education is a movement in education that seeks to engage all aspects of the learner, including mind, body, and spirit. Its philosophy, which is also identified as holistic learning theory, is based on the premise that each person finds identity, meaning, and purpose in life through connections to their local community, to the natural world, and to humanitarian values such as compassion and peace.
Plant anatomy or phytotomy is the general term for the study of the internal structure of plants. Originally, it included plant morphology, the description of the physical form and external structure of plants, but since the mid-20th century, plant anatomy has been considered a separate field referring only to internal plant structure. Plant anatomy is now frequently investigated at the cellular level, and often involves the sectioning of tissues and microscopy.
Phytomorphology is the study of the physical form and external structure of plants. This is usually considered distinct from plant anatomy, which is the study of the internal structure of plants, especially at the microscopic level. Plant morphology is useful in the visual identification of plants. Recent studies in molecular biology started to investigate the molecular processes involved in determining the conservation and diversification of plant morphologies. In these studies transcriptome conservation patterns were found to mark crucial ontogenetic transitions during the plant life cycle which may result in evolutionary constraints limiting diversification.
Agnes Arber FRS was a British plant morphologist and anatomist, historian of botany and philosopher of biology. She was born in London but lived most of her life in Cambridge, including the last 51 years of her life. She was the first woman botanist to be elected as a Fellow of the Royal Society and the third woman overall. She was the first woman to receive the Gold Medal of the Linnean Society of London for her contributions to botanical science.
Phylloclades and cladodes are flattened, photosynthetic shoots, which are usually considered to be modified branches. The two terms are used either differently or interchangeably by different authors. Phyllocladus, a genus of conifer, is named after these structures. Phylloclades/cladodes have been identified in fossils dating from as early as the Permian.
Errol Eustace Harris, sometimes cited as E. E. Harris, was a South African philosopher. His work focused on developing a systematic and coherent account of the logic, metaphysics, and epistemology implicit in contemporary understanding of the world. Harris held that, in conjunction with empirical science, the Western philosophical tradition, in its commitment to the ideal of reason, contains the resources necessary to accomplish this end. He celebrated his 100th birthday in 2008.
Evolutionary developmental biology (evo-devo) is the study of developmental programs and patterns from an evolutionary perspective. It seeks to understand the various influences shaping the form and nature of life on the planet. Evo-devo arose as a separate branch of science rather recently. An early sign of this occurred in 1999.
Rolf Martin Theodor Dahlgren was a Swedish-Danish botanist and professor at the University of Copenhagen from 1973 to his death.
In logic, a finite-valued logic is a propositional calculus in which truth values are discrete. Traditionally, in Aristotle's logic, the bivalent logic, also known as binary logic was the norm, as the law of the excluded middle precluded more than two possible values for any proposition. Modern three-valued logic allows for an additional possible truth value.