Variation In Transpiration Research Articles

Mutual Diffusional Interference Between Adjacent Stomata of a Leaf

The mutual diffusional interference between adjacent stomata in laminar flow over a leaf is shown to play a decisive role in determining overall transpiration. The magnitude of this interference varies with the interaction of the vapor diffusional shells forming above each stoma and the air flow over the leaf. The interference decreases with increasing incident radiation and wind velocity. The effect of interference on the stomatal resistance to diffusion plays a major role in the overall variations in transpiration.

Effects of Light and Temperature During Plant Growth on Subsequent Leaf Co2 Assimilation Rates Under Standard Conditions

The rate of photosynthetic C02 assimilation and transpiration as measured under standard conditions was determined for Zea maY8, Amaranthus palmeri, Helianthus annuus, Triticum ae8tivum, G088ypium hir8utum, and Phaseolus vulgare after culture at a range of temperatures (15/10 to 36/31�C day/night temperatures) and natural (seasonal) or artificial light conditions. In general, the relative classi� fication of the six species as to rate of C02 uptake was the same for plants grown under a wide range of conditions. C02 assimilation was depressed at the lower temperature limits for growth in Z. maY8 and G. hirsutum where plants were chlorotic. C02 assimilation shifted from one class of rates to another in H. annuus and G. hir8utum as seasonal radiation increased from winter to summer. Some of this change was caused by a factor inside the leaf, after seasonal variations in transpiration were accounted for. Much of the variation in CO2 assimilation within and between H. annUU8, T. ae8tivum, G. hir8utum, and P. vulgare was associated with differences in transpiration or the conductance for diffusion of CO2 into the leaf.

Transpiration: Its Effects on Plant Leaf Temperature

A definite and significant temperature gradient exists over the area of a tomato leaflet and is apparently due to the variation in transpiration across the leaflet. Transpiration is most effective at low velocities of air movement, but when the velocity increases, convection becomes the dominant factor. Leaves in which the stomata are allowed to open naturally in response to light attain temperatures about 5 degrees C lower than leaves in which the stomata are forced to remain closed.

P32‐Transport in Young Barley Plants Following Variations in Transpiration and Water Uptake

Physiologia PlantarumVolume 15, Issue 1 p. 172-176 P32-Transport in Young Barley Plants Following Variations in Transpiration and Water Uptake S. Allerup, S. Allerup Laboratory of Plant Physiology, Royal Veterinary and Agricultural College, København, DanmarkSearch for more papers by this authorJørgen Nielsen, Jørgen Nielsen Laboratory of Plant Physiology, Royal Veterinary and Agricultural College, København, DanmarkSearch for more papers by this author S. Allerup, S. Allerup Laboratory of Plant Physiology, Royal Veterinary and Agricultural College, København, DanmarkSearch for more papers by this authorJørgen Nielsen, Jørgen Nielsen Laboratory of Plant Physiology, Royal Veterinary and Agricultural College, København, DanmarkSearch for more papers by this author First published: January 1962 https://doi.org/10.1111/j.1399-3054.1962.tb07997.xCitations: 8AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinked InRedditWechat Citing Literature Volume15, Issue1January 1962Pages 172-176 RelatedInformation