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Female florets at the base of the spadix do not produce significant heat.(From Ito and Seymour 2005.) To generate this heat, the respiratory rates of some thermogenic flowers are the highest among plants, reaching over 900 nmol CO produces about five times the amount of heat produced by a 125 g rat at an air temperature of 10°C.
In springtime there, Meadows are gay with the lowest flowers and streams sleep and dance merrily as they flow down their valleys. Here are the beauteous sights of nature, more beautiful than any painting, which is, after all, imitation. The butterfly with its silken wings flits from flower to flower.
Painters make pictures of the grassy fields, streams, and flowering trees. At night the glow worm lights its lamp among the flowers and grass.
In the florets of , this is achieved by diffusion through a network of tiny intercellular gas spaces that permeate the tissue to the center.
Oxygen demand is so high that the oxygen partial pressure at the center of the floret drops to about one-quarter of atmospheric, but remains just above the critical level where oxygen uptake becomes diffusion-limited (Seymour 2001).
Close examination of the data reveals that there is a small decrease in flower temperature that occurs with falling ambient temperature (see Figure 3).
Essay Flowers Nature
Therefore is it clear that respiration in these species is relationship between temperature and rates of biochemical reactions.
Recent results from three thermoregulatory species show steeply decreasing respiration as tissue temperature increases (Figure 4).
What causes this inhibition is still unknown, but it is entirely reversible, and temperature regulation occurs within a relatively narrow range of tissue temperature.
The warm spadix is visible, because the spathe (V-shaped structure) has been cut away.
Sterile male florets in the center of the spadix are warmest, but the fertile male florets also produce heat.