Abstract：
:Previous studies have shown that plants developed under high relative air humidity (RH>85%) develop malfunctioning stomata and therefor have increased transpiration and reduced desiccation tolerance when transferred to lower RH conditions and darkness. In this study, plants developed at high RH were exposed to daily VPD fluctuations created by changes in temperature and/or RH to evaluate the potential improvements in stomatal functioning. Daily periods with an 11°C temperature increase and consequently a VPD increase (vpd: 0.36-2.37KPa) reduced the stomatal apertures and improved the stomatal functionality and desiccation tolerance of the rosette plant Arabidopsis thaliana. A similar experiment was performed with only a 4°C temperature increase and/or a RH decrease on tomato. The results showed that a daily change in VPD (vpd: 0.36-1.43KPa) also resulted in improved stomatal responsiveness and decreased water usage during growth. In tomato, the most effective treatment to increase the stomatal responsiveness to darkness as a signal for closure was daily changes in RH without a temperature increase.
journal_name
J Plant Physioljournal_title
Journal of plant physiologyauthors
Arve LE,Kruse OM,Tanino KK,Olsen JE,Futsæther C,Torre Sdoi
10.1016/j.jplph.2016.12.011subject
Has Abstractpub_date
2017-04-01 00:00:00pages
63-69eissn
0176-1617issn
1618-1328pii
S0176-1617(17)30010-Xjournal_volume
211pub_type
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