Claim · model-written summary
After cooler nights, plants with different nitrate levels may differentiate flower primordia simultaneously.
- Taxon
- pineapple
Ananas comosust0 - Outcome
- differentiate flower primordia simultaneouslye0
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleTreatmentComparatorSettingDirectionValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Following a single night of relatively low temperature or several nights when the temperature was not so low, however, plants comparatively high in nitrate-as well as others that are lower-may apparently differentiate flower primordia simultaneously”
t0“Pineapple”
Title
Nitrate and Carbohydrate Reserves in Relation to Nitrogen Nutrition of Pineapple
G. T. Nightingale Botanical Gazette 1942. doi:10.1086/335062
Other claims from this paper (15)
- Observation After blossom emergence, external nitrogen supply had essentially no influence on plant and fruit development.
- Observation White basal leaf tissue moisture changed little until storage tissue water was nearly depleted.
- Method / resource Macrochemical starch percentages failed to indicate the extent of pineapple starch reserve filling.
- Observation Yellow-green plants had starch-storing tissue filled to capacity yet a small fresh- or dry-material percentage of starch.
- Observation Black-green succulent plants contained about 25 per cent of their potential starch capacity but more absolute starch than woody plants.
- Association Greater yellow-green leaf color corresponded to higher relative starch content.
- Method / resource Relative leaf greenness provided a sufficiently precise index of carbohydrate content.
- Association Relatively low nitrate concentration reduced the efficiency or freedom of nitrate reduction.
- Intervention effect Plants with high carbohydrate reserves and temporary nitrate deficiency absorbed and reduced nitrate more vigorously after renewed supply than continuously nitrate-rich, carbohydrate-poor plants.
- Observation These temporarily nitrate-deficient plants had relatively little fruit yield loss if recovery time before budding was sufficient.
- Association Prolonged nitrate reserve deficiency before flower buds lowered fruit yields relative to prompt correction.
- Intervention effect Adding nitrogen to plants low in both nitrate and carbohydrates did not materially increase yield.
- Intervention effect Some nitrogen additions apparently decreased yield.
- Association Soil temperatures of 68⚬ F. or lower may limit root nitrate absorption.
- Association In warm-minimum seasons, nitrate-deficient carbohydrate-rich plants may fruit months earlier than plants with higher nitrate and lower carbohydrates.