FOLIAR NUTRIENT UPTAKE IN CRANBERRY

Foliar feeding of crop plants is an increasingly popular practice. The use of foliar nutrients relies on the ability of the plant to sorb nutrients through the leaves. Cranberries (Vaccinium macrocarpon Ait.) are known to have a waxy cuticle on the leaf surface which may impede nutrient uptake, leaving only the lower leaf surface for effective uptake. This study was undertaken to determine the extent of foliar nutrient uptake by cranberries using rubidium as a tracer. Rubidium was chosen for its similarity to potassium in plant uptake. In replicated plots, cranberries were sprayed with rubidium at the rate recommended for foliar potassium at three different growth stages and three different times of day. Washed and unwashed leaves were analyzed one day, one week, and one month after rubidium applications. Stem, soil, and root material was analyzed for rubidium at the one week and one month sample times. Results will be discussed with reference to uptake and movement of foliar applied nutrients in cranberries.

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Studies on nitrogen metabolism in crop plants. XX. Translocation and accumulation into sink of 15N top-dressed at different growth stages in the rice plant.

Japanese Journal of Crop Science ◽

10.1626/jcs.53.276 ◽

1984 ◽

Vol 53 (3) ◽

pp. 276-281 ◽

Cited By ~ 3

Author(s):

Takashi ORITANI

Keyword(s):

Nitrogen Metabolism ◽

Rice Plant ◽

Crop Plants ◽

Growth Stages ◽

Different Growth Stages

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Dry Matter Yield and Nutrient Uptake by Lowland Rice at Different Growth Stages

Journal of Plant Nutrition ◽

10.1081/pln-120037529 ◽

2004 ◽

Vol 27 (6) ◽

pp. 947-958 ◽

Cited By ~ 20

Author(s):

N. K. Fageria

Keyword(s):

Nutrient Uptake ◽

Dry Matter ◽

Lowland Rice ◽

Growth Stages ◽

Dry Matter Yield ◽

Different Growth Stages

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Improvement of Salt Tolerance in Maize by Exogenous Application of Proline

Journal of Environmental Science and Natural Resources ◽

10.3329/jesnr.v8i1.24626 ◽

2015 ◽

Vol 8 (1) ◽

pp. 13-18 ◽

Cited By ~ 1

Author(s):

MI Hasan ◽

MG Kibria ◽

M Jahiruddin ◽

Y Murata ◽

MA Hoque

Keyword(s):

Nutrient Uptake ◽

Antioxidant Defense ◽

Growth Parameters ◽

Growth And Yield ◽

Growth Stages ◽

Total N ◽

Exogenous Application ◽

S Uptake ◽

Maize Plants ◽

Different Growth Stages

Proline provides protection in plants against various abiotic stresses including salinity. The field experiment was conducted at the farmers field of coastal area (Botiaghata, Khulna) to mitigate the adverse effects of salinity on growth and yield of maize by exogenous application of proline. In the experiment maize plants were treated with different concentrations of proline at seedling and/or vegetative stages. The plant growth parameters, grain and stover yields, nutrient uptake and K+/Na+ ratio were recorded. All the yield contributing characters were significantly increased due to exogenous application of proline at different growth stages. Among the treatments, application of 100 mM proline at seedling and vegetative stages offered the highest grain and stover yields (5.7 t ha-1 and 9.8 t ha-1, respectively) of maize which was followed by 100 mM proline application at seedling stage where grain and stover yields were 5.7 t ha-1 and 9.7 t/ha, respectively. However no significant differences were found between two treatments. Total N, P and S uptake (203.66, 23.24 and 23.14 kg ha-1, respectively) were highest when the maize plants were treated with 100 mM proline at seedling and vegetative stages. The highest K+/Na+ ratio both in grain (12.92) and stover (5.57) was also observed in the same treatment. Therefore, it can be concluded that exogenous application of proline improves salinity tolerance in maize by increasing nutrient uptake and probably due to increasing antioxidant defense mechanisms.J. Environ. Sci. & Natural Resources, 8(1): 13-18 2015

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A Study of Ice Nucleation and Propagation in Cranberry Plant using Infrared Video Thermography

HortScience ◽

10.21273/hortsci.32.3.448b ◽

1997 ◽

Vol 32 (3) ◽

pp. 448B-448

Author(s):

Beth Ann A. Workmaster ◽

Michael Wisniewski ◽

Jiwan P. Palta

Keyword(s):

Pseudomonas Syringae ◽

Leaf Surface ◽

Ice Nucleation ◽

Vaccinium Macrocarpon ◽

Tissue Temperature ◽

Lower Leaf Surface ◽

Nucleation Barrier ◽

Infrared Video ◽

Active Bacteria ◽

Surface Ice

Infrared video thermography has recently been used to visualize ice nucleation and propagation in plants. At the UW–Madison Biotron facility, we studied the formation of ice in various parts of fruit-bearing cranberry (Vaccinium macrocarpon Ait.) uprights. The fruits were at the blush to red stages of ripening. Samples were nucleated at –1 or –2°C with ice-nucleating-active bacteria (Pseudomonas syringae). Following nucleation, samples were cooled to –6°C in ≈1 hour. The following observations were made: 1) When nucleated at a cut end, ice propagated rapidly throughout the stem and into the leaves at a tissue temperature of about –4°C. However, ice did not propagate from the stem through the pedicel to reach the fruit. During the 1 hour after ice propagation in the stem, the fruit remained supercooled. 2) Within the duration of the experiment, leaves could not be nucleated from the upper surface. Ice from the lower leaf surface did nucleate the leaf, and ice propagated from the leaf to the stem and other leaves readily. 3) Both red and blush berries could only be nucleated at the calyx end of the fruit. 4) Red berries supercooled to colder temperatures and for longer durations than the blush berries. 5) In support of our previous studies, red berries were able to tolerate some ice in their tissue. These observations suggest that: 1) The upper leaf surface and the fruit surface (other than the calyx end) are barriers to ice propagation in the cranberry plant; and 2) at later stages of fruit ripening the pedicel becomes an ice nucleation barrier from the stem to the fruit. This may contribute to the ability of the cranberry fruit to supercool.

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