Claim · model-written summary
The decrease in photosynthesis with age was not due to mutual shading.
- Taxon
- Plantago lanceolata
Plantago lanceolatat0 - Outcome
- decreasee6
- Qualifier
- not due to mutual shadinge6
Verbatim
e6“this decrease was not due to mutual shading”
t0“Plantago lanceolata”
Title
Energy metabolism of Plantago lanceolata as dependent on the supply of mineral nutrients
Hans Lambers; Freek Posthumus; Ineke Stulen; et al. Physiologia Plantarum 1981. doi:10.1111/j.1399-3054.1981.tb00883.x
Other claims from this paper (12)
- Intervention effect Shoot growth of Plantago lanceolata was immediately reduced upon transfer to low nutrient conditions.
- Intervention effect Shoot growth reacted more slowly upon transfer of plants to high nutrient conditions.
- Intervention effect Root growth was slightly reduced upon transfer of plants to high nutrient conditions, and was less dependent on nutrient supply.
- Intervention effect Photosynthesis was largely independent of the nutrient supply.
- Intervention effect Photosynthesis showed an initial increase upon transfer of plants to low nutrient conditions.
- Observation Photosynthesis decreased with age in all treatments.
- Observation The decrease of photosynthetic rate was not accompanied by a decreased relative growth rate.
- Observation The activity of the alternative nonphosphorylating pathway continuously decreased in plants grown in a high nutrient environment.
- Mechanism The decrease in photosynthetic rate was compensated by a more efficient root respiration.
- Mechanism The alternative pathway was concluded to be of significance in removal of carbohydrates that could not be used for growth or energy production.
- Mechanism The alternative pathway appeared to allow P. lanceolata plants to adapt to a changed environment as regards mineral nutrition.
- Association Experimental and theoretical values of root growth respiration correlated well if ion uptake was assumed to require about 1.0 ATP per ion per membrane passage.