Nutation (botany) flowers to open or close by movements which resemble the simple nutation of dorsiventral organs. Thus, the tulip, crocus, and other vernal flowers are very sensitive to changes in temperature. The crocus can perceive a change of 0.5°C (0.9°F), and will respond to a change of 20°C (36°F) in two minutes. Nutation (botany) Nutation is the bending movements executed by some plant organs, such as stems, leaves, roots, etc., by which the part is inclined successively in various directions. Nutations are due to the unequal rate of growth of different sides of the organ, an inequality which, so far as
Institute of Botany, Chinese Academy of Sciences systematic and evolutionary botany, vegetation and environmental change, plant molecular physiology and development, photosynthesis, and the sustainable use of plant resources. IB-CAS comprises five research units: the National Key Laboratory of Systematic and Evolutionary Botany, the National Key Laboratory of Vegetation and Environmental Change, the CAS Key Laboratory of Molecular Physiology, the CAS Key Laboratory of Photobiology and the CAS Key Laboratory of Plant Resources. In addition, it is also home to the largest herbarium in Asia, 10 field stations, the Beijing Botanical Garden and the Hua Xi Subalpine Botanical Garden in Sichuan Province. IBCAS’s herbarium collections comprise 2.63 million