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Ertan Yildirim, Huseyin Karlidag, Metin Turan, Atilla Dursun, and Fahrettin Goktepe

decrease negative environmental impacts resulting from inefficient use of chemical fertilizers is inoculation with plant growth promoting rhizobacteria (PGPR). These bacteria exert beneficial effects on plant growth and development and therefore may be used

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Don Merhaut and Julie Newman

Four types of media [coir, 1 coir: 1 peat (by volume), peat, and sandy loam soil] were evaluated for their effects on plant growth and nitrate (NO 3) leaching in the production of oriental lilies (Lilium L.) `Starfighter' and `Casa Blanca'. Twenty-five bulbs were planted in perforated plastic crates and placed on the ground in temperature-controlled greenhouses. The potential for NO 3 leaching was determined by placing an ion-exchange resin (IER) bag under each crate at the beginning of the study. After plant harvest (14 to 16 weeks), resin bags were collected and analyzed for NO 3 content. Plant tissues were dried, ground, and analyzed for N content. Results indicated that the use of coir and peat did not significantly influence plant growth (shoot dry weight) relative to the use of sandy loam soil; however, substrate type influenced the amount of NO 3 leached through the media and N accumulation in the shoots for `Starfighter', but not `Casa Blanca'.

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Shi-Ying Wang

76 ORAL SESSION 13 (Abstr. 478-483) Floriculture: Postharvest Physiology/Plant Growth Regulators

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Helen E. Hammond, Richard K. Schoellhorn, Sandra B. Wilson, and Jeffrey G. Norcini

cumbersome size for handling and shipping. Applications of plant growth regulators (PGRs) may help to extend the amount of time these plants can be held before distribution and sale, to improve visual quality, and to facilitate shipping. There are many PGRs

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Zhengyu Huang and Kimberly Ann Falco

Plant responses to plant growth regulators (PGRs) often include increases in size, biomass, and yield, thereby differentiating them from other pesticides (e.g., herbicides, fungicides, insecticides), which often include damage, inhibition, or

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Craig A. Campbell

142 WORKSHOP 19 (Abstr. 688-690) Opportunities and Challenges in the Development and Registration of Plant Growth Regulators Wednesday, 26 July, 10:00 a.m.-12:00 noon

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Maheshwari Asha, Mmbaga Margaret, Bhusal Bandana, and Ondzighi-Assoume Christine

; Petrini, 1991 ). Endophytes are ubiquitous and they function in a variety of ways, including plant growth promotion and protection against pathogens (Joshua and Mmbaga, 2020 ). Some of the possible mechanisms of action are the production of growth

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Fan Li, Shenchong Li, and Qinli Shan

cultivars, causing distinct requirements in terms of growth conditions, such as temperature, light, moisture, and nutrients. Temperature is a primary factor that affects plant growth, especially cell growth and elongation, and the process of growth can be

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Sean J. Markovic and James E. Klett

more available vegetative material during the growing season would certainly increase the propagator’s options. To achieve target uniformity, perennial producers often prune their plants manually, or, although less common, the use of plant growth

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D.W. Williams and P.B. Burrus

1 Assistant Professor. 2 Research Specialist. We gratefully acknowledge partial funding of this project by the United States Golf Association and the Kentucky Turfgrass Council. Discussions of herbicides and plant growth regulators imply no