Claim · model-written summary
High radiant flux initially lowered the chlorophyll a to b ratio and beta-carotene content in Cattleya, which recovered by three months.
- Treatment
- high radiant fluxe0
- Outcome
- Ratios of chlorophyll a to chlorophyll b and β-carotene contentse0
- Direction
- markedly lowe0
- Comparator
- controle0
CattleyaNot reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleSettingValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ratios of chlorophyll a to chlorophyll b and β-carotene contents in leaves of Cattleya plants grown at the high radiant flux were markedly low after one month from the onset of shading, but they increased to the same levels as the control after 3 months”
Title
Jincai Li; Xiheng Zhao; Shuichiro Matsui Journal of the Japanese Society for Horticultural Science 2001. doi:10.2503/jjshs.70.372
Other claims from this paper (17)
- Observation Antioxidative enzyme activities were greater in Cattleya than Cymbidium.
- Observation In Cattleya, enzyme activities rose slightly during daytime.
- Observation In Cymbidium, enzyme activities rose at the start of night.
- Intervention effect Full sunlight reduced SOD activity in Cattleya leaves.
- Intervention effect Full sunlight greatly enhanced CAT activity in Cattleya leaves.
- Intervention effect Full sunlight slightly promoted APX activity in Cattleya leaves.
- Intervention effect Full sunlight decreased SOD and CAT activities in Cymbidium leaves.
- Intervention effect Full sunlight slightly decreased APX activity in Cymbidium leaves.
- Intervention effect High radiant flux significantly decreased SOD and CAT activities in Cattleya leaves relative to control after one month.
- Observation Cattleya CAT activity recovered slightly during further cultivation.
- Intervention effect High radiant flux decreased SOD, APX and CAT activities in Cymbidium leaves over three months.
- Intervention effect Low radiant flux increased and sustained APX and CAT activities in Cattleya and Cymbidium leaves.
- Association Foliar chlorophyll contents declined as radiant flux increased in both orchid hybrids.
- Association Foliar chlorophyll contents were positively correlated with the three enzyme activities.
- Intervention effect High radiant flux slightly decreased chlorophyll a to b ratio and beta-carotene content in Cymbidium leaves.
- Intervention effect Low radiant flux greatly increased chlorophyll and beta-carotene contents in Cymbidium.
- Observation Cattleya was interpreted as better adapted to high radiant flux than Cymbidium.