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Date: | Sun, 19 Jun 2022 09:30:08 -0400 |
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Whole books have been written on this subject. For example, this excerpt ...
> Temperature is the environmental variable that is most often cited as related to nectar secretion rate. Temperature affects the rate of photosynthesis that contributes, directly or indirectly, to nectar production . Nectar secretion decreases at low temperature in most species but decreasing nectar production is also reported with increasing temperature in Ipomopsis longiflora and Trifolium repens. The optimum range of temperature for nectar secretion is known in only a few species.
> In Mediterranean plants, nectar secretion is adapted to higher temperatures; optimal nectar secretion in Thymus capitatus is at 32.5°C. When this plant is grown at lower temperatures, nectar production is a function of light intensity. In natural conditions, the best nectar yields may occur in years with high precipitation . Water availability has long been invoked as a major factor in the regulation of nectar secretion rate; in Impatiens glandulifera, however, it is apparently without any major effects.
... is from: Nicolson, S. W., Nepi, M., & Pacini, E. (Eds.). (2007). Nectaries and Nectar. Springer Science & Business Media. 395 pp.
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