Claim · model-written summary
These temporarily nitrate-deficient plants had relatively little fruit yield loss if recovery time before budding was sufficient.
- Taxon
- pineapple
Ananas comosust0 - Outcome
- yield of fruite0
- Direction
- relatively little losse0
- Comparator
- other plants that were at no time deficient in nitrate relative to carbohydratese0
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleTreatmentSettingValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“provided the time until budding was adequate for plants to recover in content of nitrate and synthesize new protein, there was relatively little loss in yield of fruit, as compared with other plants that were at no time deficient in nitrate relative to carbohydrates”
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.
- 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.
- Observation After cooler nights, plants with different nitrate levels may differentiate flower primordia simultaneously.