Claim · model-written summary
Leaf water content relative to dry mass or organic matter began to decline during the late embryonal phase.
- Taxon
- Mesembryanthemum crystallinum L.
Mesembryanthemum crystallinume0 - Organ / stage
- late embryonal phasee1
- Outcome
- water contente1
- Direction
- decreasee1
Verbatim
e0“Mesembryanthemum crystallinum L.”
e1“Related to dry mass or organic matter (i.e. dry mass corrected for the mass of inorganic ions) water content started to decrease during the late embryonal phase of the life cycle.”
Title
Influence of leaf water content on the C3–CAM transition in Mesembryanthemum crystallinum
WERNER B. HERPPICH; MARGARETHA HERPPICH New Phytologist 1997. doi:10.1046/j.1469-8137.1997.00762.x
Other claims from this paper (14)
- Intervention effect Salt-stressed plants had lower dry-mass-basis water content than well-watered plants.
- Intervention effect Salt-stressed and well-watered plants did not differ in water content on an organic-matter basis.
- Mechanism Salt treatment did not reduce leaf water content; the dry-mass basis distorted the comparison.
- Mechanism Increased leaf succulence and pressure potential prevented long-term water deficit.
- Mechanism The succulence and pressure-potential changes indicated enhanced vacuolisation, described as a prerequisite for CAM development.
- Mechanism Completion of differentiation might permit nocturnal malic acid accumulation in a threshold response.
- Intervention effect Each salt treatment produced short-term water deficits at onset, independent of plant age.
- Mechanism Incomplete osmotic adaptation explained short-term deficits after salt treatment.
- Observation δ-malate appeared only when plants were about 35 days old.
- Mechanism Short-term water deficit was considered unlikely to be the decisive CAM-inducing factor.
- Observation Water content began to decline during light periods about two weeks after germination in all treatments.
- Observation The daytime water-content decline disappeared after CAM was fully established.
- Mechanism Daytime transpirational water loss was considered unlikely to cause the metabolic shift because it did not induce the shift in young plants.
- Mechanism Environmental stress can induce δ-malate only after sufficient leaf and plant differentiation.
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