Claim · model-written summary
Relative water content rose at midday by at least half the morning drop.
Verbatim
e0“This decrease was followed by an increase in RWC during midday which was at least as high as half of the morning drop.”
e1“rose (Rosa hyb.)”
Title
Diurnal Pattern of Plant Water Status and CO2 Fixation of Roses as Affected by Irrigation Regimes1
Z. Plaut; A. H. Halevy; Y. Diskin Journal of the American Society for Horticultural Science 1975. doi:10.21273/jashs.100.2.191
Other claims from this paper (13)
- Observation Shoot water potential fell until late morning, remained minimal at midday, then rose in the afternoon.
- Observation The diurnal shoot water potential pattern occurred regardless of season or moisture regime.
- Intervention effect Midday minimum shoot water potential was usually 2–6 bars lower under dry irrigation.
- Observation Wet treatment leaf relative water content fell from 96 to 81% from 0700 to 1100 in September.
- Observation Dry treatment leaf relative water content fell from 85 to 70% from 0700 to 1100 in September.
- Observation Midwinter relative water content fell by 8% in the wet treatment.
- Observation Midwinter relative water content fell by 12% in the dry treatment.
- Association Relative water content changes corresponded to stomatal movement.
- Association CO2 fixation varied with radiation flux density.
- Association CO2 fixation varied with shoot water potential.
- Association Morning CO2 fixation was usually related to radiation flux density when water potential remained high.
- Mechanism Shoot water potential became a stronger control of midday CO2 fixation.
- Mechanism The authors suggest mesophyll resistance also controls fixation under impaired water status.
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Hordeum vulgare