Plant physiology; a textbook for colleges and universities, by Bernard S. Meyer ... and Donald B. Anderson ...

Measuring Transpiration of Undisturbed Tamarisk Shrubs

“…Absolute and relative humidities increased, but tllere was no correspon(ling decrease of Vp(l. Thus the results seemii, at first glance, to be at variance with the widely accepted belief (1,11) that evaporation rates are generally imiore nearly correlated with vpdl than with any otlher lhumlidity expression. However, the results probablv just confirm the alrea(ld well-knowln fact (1,11) It is interesting that although a linear dependence of transpiration rate on vpd has been acceptedl videly in principle, experiimiental confirmation of the relationslhip has been lacking or at least not cited in readily accessible sources. Some of the data reported by Mfartin (10) suggest a linear relationship.…”

Negative transport & resistance to water flow through plants

“…No reports from the literature have been found that mention the possibility of the hydathodes functioning in the movement of water into and out of the leaf except in the process of guttation. It has also been observed that the drops of guttation water are sometimes reabsorbed through these pores (18). This evidence, coupled with the observation that the water moved into and through the hydathodes of the leaf equally well in both the normal and negative directions, indicates that these pores might be involved in water absorption through the leaf.…”

Duration of meiosis in relation to temperature

“…where Q10 values of 2o to 2 • are usual within the range of i o° C. to 30° C., and with higher values at temperatures below io° C. (Meyer and Anderson, 1952). Brown (1951) found that the mean duration of mitosis in Pisurn at various temperatures was as follows : 150 C., 295 hours 2.…”