Botanists from the United States

388 quotes found

"My attitude toward life was also my attitude toward science. Jesus said one must be born again, must become as a little child. He must let no laziness, no fear, no stubbornness keep him from his duty. If he were born again he would see life from such a plane he would have the energy not to be impeded in his duty by these various sidetrackers and inhibitions. My work, my life, must be in the spirit of a little child seeking only to know the truth and follow it. My purpose alone must be God's purpose - to increase the welfare and happiness of His people. Nature will not permit a vacuum. It will be filled with something. Human need is really a great spiritual vacuum which God seeks to fill... With one hand in the hand of a fellow man in need and the other in the hand of Christ, He could get across the vacuum and I became an agent. Then the passage, "I can do all things through Christ which strengtheneth me," came to have real meaning. As I worked on projects which fulfilled a real human need forces were working through me which amazed me. I would often go to sleep with an apparently insoluble problem. When I woke the answer was there. Why, then, should we who believe in Christ be so surprised at what God can do with a willing man in a laboratory? Some things must be baffling to the critic who has never been born again."

- George Washington Carver

0 likesBiologists from the United StatesInventorsBotanists from the United StatesAfrican AmericansPeople from Missouri
"Whenever like mates with like (genetically), the statistical distribution curve, which describes the frequency of the purely fortuitous combinations of genes, is flattened out, its mode is depressed, and its extremes are increased. This reduces the number of the mediocre produced and increases the numbers both of the sub-normal and the talented groups. It is possible that, without this increase in the number of extreme variants, no nation, race or group could produce enough superior individuals to maintain a complex culture. Certainly not enough to operate or advance a civilization. ...Any number of social customs have stood, and still stand, in the way of an optimum amount of selective matings. In a feudal society, opportunities are denied to many able men who, consequently, never develop to the high level of their biological potential and thus they remain among the undistinguished. Such able men (and women) might also be diffused throughout an "ideal" classless society and, lacking the means to separate themselves from the generality, or to develop their peculiar talents, would be effectively swamped. In such a society they could hardly segregate in groups. In fact, only a few of the able males might ever meet an able female who appealed to them erotically. Obviously an open society—one in which the able may rise and the dim-wits sink, and where like intelligences have a greater chance of meeting and mating—has advantages that other societies do not have. Our own society today—incidentally and without design—is providing more and more opportunities for intelligent matrimonial discrimination. It is possible that our co-educational colleges, where highly-selected males and females meet when young, are as important in their function of bringing together the parents of our future superior individuals as they are in educating the present crop."

- Conway Zirkle

0 likesBotanists from the United StatesHistorians from the United StatesPhilosophers from the United StatesUniversity of Pennsylvania faculty
"An experiment conducted in the mid-nineteen forties prepared me to expect unusual responses of a genome to challenges for which the genome is unprepared to meet in an orderly, programmed manner. In most known instances of this kind, the types of response were not predictable in advance of initial observations of them. It was necessary to subject the genome repeatedly to the same challenge in order to observe and appreciate the nature of the changes it induces. Familiar examples of this are the production of mutation by X-rays and by some mutagenic agents. In contrast to such “shocks” for which the genome is unprepared, are those a genome must face repeatedly, and for which it is prepared to respond in a programmed manner. Examples are the “heat shock” responses in eukaryotic organisms, and the “SOS” responses in bacteria. Each of these initiates a highly programmed sequence of events within the cell that serves to cushion the effects of the shock. Some sensing mechanism must be present in these instances to alert the cell to imminent danger, and to set in motion the orderly sequence of events that will mitigate this danger. The responses of genomes to unanticipated challenges are not so precisely programmed. Nevertheless, these are sensed, and the genome responds in a descernible but initially unforeseen manner."

- Barbara McClintock

0 likesWomen academics from the United StatesBotanists from the United StatesGeneticistsNobel laureates in Physiology or MedicineBiologists from the United States
"When Barbara McClintock was awarded a Nobel Prize for her work on gene transposition in corn plants, the most striking thing about her was that she made her discoveries by listening to what the corn spoke to her, by respecting the life of the corn and "letting it McClintock says she learned "the stories" of the plants. She "heard them. She watched the daily green journeys of growth from carth toward sky and sun. She knew her plants in the way a healer or mystic would have known them, from the inside, the inner voices of corn and woman speaking to one another. As an Indian woman, I come from a long history of people who have listened to the language of this continent, people who have known that corn grows with the songs and prayers of the people, that it has a story to tell, that the world is alive...This intuitive and common language is what I seek for my writing, work in touch with the mystery and force of life, work that speaks a few of the many voices around us, and it is important to me that McClintock listened to the voices of corn. It is important to the continuance of life that she told the truth of her method and that it reminded us all of where our strength, our knowing, and our sustenance come from. It is also poetry, this science, and I note how often scientific theories lead to the world of poetry and vision, theories telling us how atoms that were stars have been transformed into our living, breathing bodies. And in these theories, or maybe they should be called stories, we begin to understand how we are each many people, including the stars we once were, and how we are in essence the earth and the universe, how what we do travels clear around the earth and returns. In a single moment of our living, there is our ancestral and personal history, our future, even our deaths planted in us and already growing toward their fulfillment. The corn plants are there, and like all the rest we are forever merging our borders with theirs in the world collective."

- Barbara McClintock

0 likesWomen academics from the United StatesBotanists from the United StatesGeneticistsNobel laureates in Physiology or MedicineBiologists from the United States
"The federal government's Indian Removal policies wrenched many Native peoples from our homelands. It separated us from our traditional knowledge and lifeways, the bones of our ancestors, our sustaining plants—but even this did not extinguish identity. So the government tried a new tool, separating children from their families and cultures, sending them far away to school, long enough, they hoped, to make them forget who they were. [...] Children, language, lands: almost everything was stripped away, stolen when you weren't looking because you were trying to stay alive. In the face of such loss, one thing our people could not surrender was the meaning of land. In the settler mind, land was property, real estate, capital, or natural resources. But to our people, it was everything: identity, the connection to our ancestors, the home of our nonhuman kinfolk, our pharmacy, our library, the source of all that sustained us. Our lands were where our responsibility to the world was enacted, sacred ground. It belonged to itself; it was a gift, not a commodity, so it could never be bought or sold. These are the meanings people took with them when they were forced from their ancient homelands to new places. Whether it was their homeland or the new land forced upon them, land held in common gave people strength; it gave them something to fight for. And so—in the eyes of the federal government—that belief was a threat."

- Robin Wall Kimmerer

0 likesWomen authors from the United StatesEnvironmentalists from the United StatesNaturalists from the United StatesBotanists from the United StatesWomen scientists from the United States
"Not all s evolve at the same rate, some early species were actually so well adapted that they competed successfully against newer species. are so well suited to life in oceans, lakes, and streams that they still thrive even though most features present in modern, living algae must be more or less identical to those present in the ancestral algae that lived more than 1 billion years ago. Features that seem relatively unchanged are relictual features (technically known as , formerly called primitive features). Like the algae, s are well-adapted to certain habitats and have not changed much in 250 million years; they too have many relictual features. Modern conifers are similar to early ones that arose around 320 millions years ago. The most recently evolved group consists of the flowering plants, which originated about 100 to 120 million years ago with the evolution of several features: flowers, broad, flat, simple leaves, and that conducts water with little friction. The members of the (sunflowers, daisies, and s) ... have many features that evolved recently from features present in ancestral flowering plants. These are derived features (technically known as , formerly called advanced features (i.e., they have been derived evolutionarily from ancient features). One recent (highly derived ) feature in the asters is a . The terms "primitive" and "advanced" are avoided in that they imply inferior and superior."

- James D. Mauseth

0 likesAcademics from the United StatesBotanists from the United StatesNon-fiction authors from the United StatesScience authors from the United StatesPeople from Washington (state)
"Ancestral presumably had abundant, fibrous, heavily , similar to that present in the relictual, leaf-bearing genus '. During the evolutionary radiation of the subfamily , diverse types of bodies and woods arose. Several evolutionary lines have retained an abundant, fibrous wood: all wood cells, even ray cells, have thick lignified walls, and axial is only scanty paratracheal. Aside from a diversity of vessel diameters, there seems to be little protection against during water-stress, and little capacity. This strong wood permits the plants to be tall and to compete for light in their tree-shaded semi-arid habitats. In other evolutionary lines, the wood lacks fibres, and almost all cells have thin, unlignified walls. Vessels occur in an extensive matrix of water-storing parenchyma, and tracheids are also abundant, constituting over half the axial tissue in some species. There is excellent protection against cavitation, but little mechanical support for the plant body; however, these plants are short and occur in extremely arid, unshaded sites. Scandent, vinelike plants of two genera produce a dimorphic wood—while their shoots are extending without external support, they produce fibrous, lignified wood, but after leaning against a host branch, they produce a parenchymatous, unlignified wood."

- James D. Mauseth

0 likesAcademics from the United StatesBotanists from the United StatesNon-fiction authors from the United StatesScience authors from the United StatesPeople from Washington (state)
"Waite’s profound research into the nature and cause of the of the was spectacular and had far-reaching results. He had an incubator full of the pear blight organism, Bacillus amylovorus, and could produce the blight at will by dipping a needle into the culture and inserting it into the growing tip of a pear branch. He believed that bees carried the blight from infected flowers to healthy ones. Doctor Maxwell, a little country doctor of , challenged Waite to prove this on his trees. The results were disastrous! A short time after Waite inoculated the flowers on a few trees, Doctor Maxwell suddenly realized that the bees had spread the blight all over his orchard. He sent a frantic telegram to Washington, but there was little that could be done, for the disease had made such headway that Waite could not stop it. Waite next went South and there made another far-reaching discovery. In an immense orchard of s, the trees mysteriously failed to bear fruit. Waite managed to solve the problem, and returned to Washington in a great state of excitement. His discovery was that the Bartlett pear flower is practically sterile to its own pollen. Hence he found that the only fruit was on trees along the outer edge of the big orchard. He interpreted this phenomenon as indicating that the bees from near-by orchards of other varieties had brought foreign pollen and pollinated the first trees they came to. Basing his experiments on this assumption he proved that it was correct. It was a very real discovery, a precursor of what has now become a generally accepted principle of horticulture, the principle of mixed plantings."

- David Fairchild

0 likesBotanists from the United StatesNon-fiction authors from the United States