Potassium‐transport rate from root to shoot unrelated to potassium‐use efficiency in tomato grown under low‐potassium stress

Chen, Jianjun; Gabelman, W. H.

doi:10.1080/01904169909365658

Cited by 15 publications

(5 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The xylem sap flux was about 0.86±0.26 mL g' 1 h" 1 during the first day, in agreement with excision experiment on tomato (Chen and Gabelman, 1999). Monitoring the flux of xylem sap over a period of 48 hour showed a nychtemeral rhythm for all the roots of the excised plants and with both -Ca and +Ca treatments ( Figure 1).…”

Section: Xylem Sap Fluxsupporting

confidence: 81%

Effects of calcium deficiency on nutrient concentration of xylem sap of excised tomato plants

Morard

Lacoste

Silvestre

2000

Journal of Plant Nutrition

View full text Add to dashboard Cite

The effects of calcium (Ca) deficiency on cation uptake and concentration of xylem sap from tomato roots after excision of the aerial parts, were studied. The measurements were made on tomato plants grown on nutrient solutions with +Ca or without -Ca, over a period of 48 hours. Calcium deficiency entailed a significant increase of the flux of xylem sap between the 6th and 14th hour on the first day after excision. In spite of the lack of Ca in the nutrient solution, the Ca concentration in xylem sap was unaffected in regard to that of excised roots with +Ca. The maintenance of the Ca concentration in xylem sap of plants grown on a Ca deficient solution was related to a reuse of the Ca from the apoplastic root stores. So, this regulation indicates a possible translocation of the Ca available in the root supply and a mobility of this element out of the roots only during the early stages of exposure to a Ca deficiency. The presence of NH 4 + in xylem sap with both +Ca and -Ca treatments confirms the nitrogenous reduction activity of tomato roots. The accumulation of free ammonium 24 h after excision in both xylem saps (+Ca and -Ca) is likely to be evidence of an alteration process of protein synthesis which is related to the depletion of the root water soluble carbohydrate supply.

show abstract

Section: Xylem Sap Fluxsupporting

confidence: 81%

Effects of calcium deficiency on nutrient concentration of xylem sap of excised tomato plants

Morard

Lacoste

Silvestre

2000

Journal of Plant Nutrition

View full text Add to dashboard Cite

show abstract

“…Silberbush and Lips (1991) reported much greater N and K uptake with greater K rate. Chen and Gabelman (1999) also reported that mobility of K + from mature leaves to young ones is an important factor that contributes to KUE in plants grown under low K level. Therefore, supplying suitable K to keep balance of N and K is extremely important to improve NUE, yield, and quality of cotton under adequate N supply.…”

Section: Potassium Uptake Efficiency (Kue%)mentioning

confidence: 94%

Effect of Potassium Fertilizers on Cotton Yield and Nitrogen Uptake Efficiency in an Aridisol

Khalifa

Al-Chammaa

Al-Ain

2012

Communications in Soil Science and Plant Analysis

View full text Add to dashboard Cite

A field experiment was carried out to study the effect of different rates of potassium (K) fertilizer [0, 50, 100, and 150 potassium oxide (K 2 O) ha -1 ] in the presence of increased supply of nitrogen (N) (120, 180, and 240 kg N ha -1 ) on cotton (Gossypium hirsutum L.) yield and the N and K use efficiencies using the 15 N isotopic dilution technique. Potassium fertilizer increased cotton yield, which was significant and more pronounced with the application of N in the high level (N3). The greatest cotton yield (6442 kg ha -1 ) was obtained in N2K3 treatment with an increase of 14% over the control. In addition, K fertilizer significantly increased N uptake efficiency in the N2 and N3 treatments. The greatest N uptake efficiency (98%) was in N2K3 treatment. The greatest K uptake efficiency (42%) was occurred in N3K1 treatment. In conclusion, the use of K fertilizer could be useful when growing cotton in soils of moderate to high N content to improve N uptake efficiency and consequently increase cotton yield.

show abstract

“…O pen-field tomato production in Florida occurs on %32,000 acres and generates above $630 million in gross sales (U.S. Department of Agriculture, 2011). Potassium is one of the two most-absorbed essential elements for tomato growth and development (Carpena et al, 1988;Chapagain et al, 2003;Chen and Gabelman, 1999;Tapia and Gutierrez, 1997). Tomato crop uptake could exceed 300 kgÁha -1 of K and the majority is translocated to the fruit (Hartz et al, 2002;Widders and Lorenz, 1979).…”

mentioning

confidence: 99%

Effects of Preplant Potassium Sources and Rates for Tomato Production

Santos

2013

hortte

View full text Add to dashboard Cite

A two-season study was conducted to assess the effects of preplant potassium (K) fertilization rates and sources on the growth and yield of beefsteak tomato (Solanum lycopersicum). Fourteen treatments resulted from the combination of two K sources: sulfate of potash [SOP (0N–0P–42K)] and muriate of potash [MOP (potassium chloride, 0N–0P–50K)] and seven preplant K rates (0, 50, 100, 200, 300, 400, and 500 lb/acre). Soil electrical conductivity (EC) at 4 weeks after transplanting was influenced by the interaction between preplant K rates and sources. When SOP was applied, soil EC increased from 0.4 dS·m−1 with no preplant K application to ≈1.3 dS·m−1 with a rate of 500 lb/acre of preplant K. However, the soil EC steadily increased from 0.4 to 3.0 dS·m−1 as preplant K rates increased from 0 to 500 lb/acre when MOP was used as the nutrient source. The combined effect of the preplant application of K rates and sources influenced the seasonal extra-large and total marketable fruit weight, which increased steadily with K rates, regardless of the sources, from 0 to 300 lb/acre. At K rates between 300 and 500 lb/acre, there were no extra-large and total fruit weight differences among rates when SOP was applied. In contrast, extra-large and total marketable fruit weight declined when rates increased from 300 to 500 lb/acre of K and MOP was applied to the soil. Data demonstrated that plots treated with MOP at rates higher than 300 lb/acre of K increased soil EC and caused a decline on extra-large and total marketable fruit weight of tomato.

show abstract

Potassium‐transport rate from root to shoot unrelated to potassium‐use efficiency in tomato grown under low‐potassium stress

Cited by 15 publications

References 21 publications

Effects of calcium deficiency on nutrient concentration of xylem sap of excised tomato plants

Effects of calcium deficiency on nutrient concentration of xylem sap of excised tomato plants

Effect of Potassium Fertilizers on Cotton Yield and Nitrogen Uptake Efficiency in an Aridisol

Effects of Preplant Potassium Sources and Rates for Tomato Production

Contact Info

Product

Resources

About