Augustine Pyramus de Candolle

Augustine Pyramus de Candolle and the Biological Clock

Augustine Pyramus de Candolle and the Biological Clock

On September 9, 1841, Swiss botanist Augustin Pyramus de Candolle passed away. Candolle originated the idea of “Nature’s war”, which influenced Charles Darwin and the principle of natural selection.[3,4] Furthermore, he recognized that multiple species may develop similar characteristics that did not appear in a common evolutionary ancestor; this was later termed analogy. During his work with plants, de Candolle noticed that plant leaf movements follow a near-24-hour cycle in constant light, suggesting that…
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Katherine Esau and the Anatomy of Plants

Katherine Esau and the Anatomy of Plants

On April 3, 1898, German-American botanist Katherine Esau was born. Esau did groundbreaking work in the structure and workings of plants. She is best known for her research into the effects of viruses upon plant tissues, and her studies of plant tissue structures and physiology. “I found ways of maintaining spiritual independence while adjusting myself to established policies. . . . I have never felt that my career was being affected by the…
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