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  • Author or Editor: D. R. Paterson x
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Abstract

Concentration of endogenous ethylene was higher in Ag+-treated cuttings of sweet potato (Ipomoea batatas Lam.) than in the control or in cuttings subjected to 48°C for 2 minutes. When leaf tissue was dipped in 0, 125, 250, or 500 mg/liter Ag+, endogenous ethylene was increased by the 250 and 500 mg/liter treatments. When equal concentrations of NO3– were applied to cuttings as KNO3, Ca(N)O3)2, or AgNO3, only AgNO3 increased the endogenous ethylene content.

Open Access

Abstract

The lower 15 cm (4 nodes) of vine tip cuttings of sweet potato (Ipomoea batatas (L.) Lam. cv Jewel) were planted in blasting sand and immersed in a full strength Hoagland’s nutrient solution to a height of either 5 or 15 cm. More roots were initiated at the two lower nodes and roots were more numerous and larger by 6-12 weeks in the 5 cm immersion level while at the 15 cm level more roots originated at the upper nodes. Endogenous ethylene (C2H4) increased in the stems of plants immersed to a height of 15 cm.

Open Access

Abstract

The ‘Topaz’ (Fig. 1) sweet potato [Ipomoea batatas (L.) Lam.], developed by the Texas Agricultural Experiment Station, combines high yield good sprout production, and excellent baking and canning quality.

Open Access

Abstract

Ethylene (C2H4) was higher in the internal atmosphere of crown gall infected rose bushes than in healthy plants. C2H4 was higher in the crown and root tissues than in the top of normal as well as crown gall infected plants.

Open Access

Abstract

The ‘Cordner’ sweet potato [Ipomoea batatas (L.) Lam.], developed jointly by the Texas Agricultural Experiment Station and Oklahoma State Univ., combines high yield, good sprout production, and excellent baking and canning quality.

Open Access

Abstract

In the article “Interaction between an Indigenous Endomycorrhizal Fungus and Mineral Nutrition of Rosa multiflora Understock” by D.R. Paterson, Ruth A. Taber, H.B. Pemberton, and D.R. Earhart (HortScience 21:312-313, Apr. 1986), the last line of data in Table 1 was printed incorrectly.

Open Access

Abstract

Disbudded ‘Brooks 56’ Rosa multiflora Thunb. plants were grown in 0.01 or 0.1 Steiner solutions and inoculated with indigenous vesicular-arbuscular mycorrhizal fungal (VAMF) species, Glomus fasciculatum (Thax. sensu Gerd.) Gerd. and Trappe. Inoculation resulted in a significant increase in both fresh and dry weight of the R. multiflora plants. Increasing the Steiner solution from 0.01 to 0.1 resulted not only in a significant decrease in the rate of VAMF infection, but also in a significant increase in the fresh and dry weight of the multiflora understock.

Open Access

Research was conducted with sweet corn (Zea mays L.) to evaluate the presidedress soil NO3 test (PSNT) originally developed for use on field corn on a wide range of New Jersey soils. Soil NO3-N concentrations reflected differences in N availability due to manure or preplant N application. The relationship between soil NO3-N concentration and relative yield of marketable ears was examined using Cate–Nelson analysis to define the PSNT critical level. Soil NO3-N concentrations >25 mg·kg–1 were associated with relative yields at ≥92%. The success rate for the PSNT critical level was 85% for predicting whether sidedress N was needed. Including NH4-N in the soil analysis did not improve the accuracy of the soil test for predicting whether sidedress N was needed. Although the PSNT is quite accurate in identifying N-sufficient sites, it appears to offer only limited guidance in making N-fertilizer rate predictions. The PSNT is most useful on manured soils, which frequently have sufficient N. The test likely will help decrease the practice of applying “insurance” fertilizer N and the ensuing potential for NO3 pollution of the environment.

Free access

Abstract

A high percentage of successful bud unions were obtained by bench chip budding selected Rosa hybrida L. budwood on dormant, unrooted Rosa multiflora Thunb. understock. Chip budding was successful using both hand technique and a Liliput grafting tool. Parafilm strips were the most effective graft wrapping material.

Open Access

Abstract

Out of 38 lines of sweet potato [Ipomoea batatas (L.) Lam.] which had demonstrated some resistance in laboratory tests to the sweetpotato weevil, Cylas formicarius elegantulus (Summers), 13 lines had significant levels of resistance, based on weevil free yield in artificially infested fields in Yoakum, Texas. Two lines, W 125 and W 119, previously released as having weevil resistance, maintained a high level of resistance.

Open Access