Relative Humidity Influences Yield, Edible Biomass, and Linear Growth Rate of Sweetpotato

  title={Relative Humidity Influences Yield, Edible Biomass, and Linear Growth Rate of Sweetpotato},
  author={D. Mortley and C. Bonsi and P. A. Loretan and W. Hill and C. E. Morris},
Growth chamber experiments were conducted to study the physiological and growth response of sweetpotato [Ipomoea batatas (L.) Lam.] to either 50% or 85% relative humidity (RH). Vine cuttings of T1-155 were grown using the nutrient film technique in a randomized complete-block design with two replications. Temperature regimes of 28/ 22C were maintained during the light/dark periods with irradiance at canopy level of 600 μmol-m -2 -s -1 and a 14/10-hour photoperiod [...] 
Physiological, Morphological Changes and Storage Root Yield of Sweetpotato [Ipomoea batatas (L.) Lam.] under PEG-Induced Water Stress
Chlorophyll degradation, chlorophyll fluorescence diminution and stomatal closure were found in plants grown under PEG-induced water deficit conditions, leading to reduction in net photosynthetic rate and subsequently lesser amounts of glucose and fructose contents in the leaf tissues. Expand
Root Temperature Effects on Tuberous Root Growth of Sweetpotato (Ipomoea batatas Lam.)
Root temperature effects on tuberous root growth of sweetpotato were examined using a hydroponic system where the temperature conditions of shoot, tuberous root and fibrous roots were controlledExpand
Influence of Microgravity Environment on Root Growth, Soluble Sugars, and Starch Concentration of Sweetpotato Stem Cuttings.
  • D. Mortley, C. Bonsi, +7 authors R. Wheeler
  • Biology, Medicine
  • Journal of the American Society for Horticultural Science. American Society for Horticultural Science
  • 2008
Investigation of the impact of microgravity on root growth, distribution of amyloplasts in the root cells, and on the concentration of soluble sugars and starch in the stems of sweetpotatoes suggests that the space flight environment did not adversely impact sweetpotato metabolism and that vegetative cuttings should be an acceptable approach for propagatingSweetpotato plants for space applications. Expand
Split-Root Nutrition of Sweetpotato in Hydroponic Systems
Nutrient film technique (NFl) and deep water culture (DWC) hydroponic systems were used in a split-root study of the effect of four treatments on sweetpotato yield, the translocation of assimilates,Expand
Effect of microclimatic parameters at different sowing dates on capsule production of sesame (Sesamum indicum L.) in a tropical humid region
The highest capsule production by the main stem and the first, second and third primary branches in accrocentric order was observed for the crop sown on 19 February, and thecultivar Rama produced higher numbers of capsules in branches than Kanke-1 and B-67 at all times of sowing. Expand
Sweetpotato vine management for confined food production in a space life-support system
Abstract Sweetpotato (Ipomea batatas L.) ‘Whatley–Loretan’ was developed for space life support by researchers at Tuskegee University for its highly productive, nutritious storage roots. ThisExpand
Oxygen isotope enrichment in rice (Oryza sativa L.) grain organic matter captures signature of relative humidity.
  • R. Kaushal, P. Ghosh
  • Biology, Medicine
  • Plant science : an international journal of experimental plant biology
  • 2018
The study provides insights into the rice plant's oxygen isotope systematics that build the foundation for future applications of the stable isotope technique to study the interactions between rice and environment. Expand
Fruit , Vegetable and Cereal Science and Biotechnology
Sweetpotato is an important tropical tuber crop cultivated mostly under temperate and mild tropical climatic conditions. Its tubers are rich in carbohydrate and some are rich in carotene. The crop isExpand
Functional and physicochemical properties, and storage stability of instantized purple sweet potato (Ipomoea batatas L.) Powder
Purple-flesh sweet potatoes (Ipomoea batatas L.) are commonly consumed as boiled tuber, traditional cakes and crispy snacks. Developing instantized purple sweet potato powder (IPSPP) from this tuberExpand
Int. J. Biosci
Allelopathic effects of four crops including wheat, barley, canola, and safflower were studied on seed germinations and embryonic growth of wild mustard using different aqueous extract concentrationsExpand


Plant Spacing Influences Yield and Linear Growth Rate of Sweetpotatoes Grown Hydroponically
Storage root count, fresh and dry weights, and linear growth rate of sweetpotatoes grown by use of the nutrient film technique declined linearly in response to decreased BCS, while fresh anddry foliage weight decreased linearly and quadratically as spacing was reduced within the growth channels. Expand
Water Relations and Growth of Cotton as Influenced by Salinity and Relative Humidity1
The relative yield of dry matter and leaf area as a function of salinity was the same at all relative humidities, indicating that no interaction between salinity and relative humidity occurred. Expand
Relationship of photosynthesis and harvest index to sweet potato yield.
The study suggests that genotypes have different leaf sizes, and the mean Pn for 'Centennial' sweet potato was lower than for 20 other genotypes, except one, but it ranked third in storage root yield (Bhagsari and Harmon, 1982). Expand
Utilization of sweet potatoes in controlled ecological life support systems (CELSS).
Early and late maturing sweet potato varieties were studied in hydroponic systems of different types--static with periodic replacement, flowing with and without recirculation, aggregate, and non-aggregate, and significant cultivar differences were found in all systems studied. Expand
Plant productivity in controlled environments.
  • F. Salisbury, B. Bugbee
  • Environmental Science, Medicine
  • HortScience : a publication of the American Society for Horticultural Science
  • 1988
These figures suggest that approximately 30 m2 under continuous production could support an astronaut with sufficient protein and about 2800 kcal day-1, and suggest that sufficient food could be produced in the limited areas and with the limited energy that might be available. Expand
Growth of lettuce under controlled humidity levels
  • J . Amer . Soc . Hort . Sci .
  • 1976
The Water-Culture Method for Growing Plants Without Soil