Claim · model-written summary
Midwinter relative water content fell by 8% in the wet treatment.
Verbatim
e0“The decrease in RWC during midwinter was only 8% and 12%, respectively, in the 2 treatments.”
e1“wet and dry treatments”
e2“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 12% in the dry treatment.
- Observation Relative water content rose at midday by at least half the morning drop.
- 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.