Table of Contents

Message from the President

iii

Meeting Summary (from PGRSA webpage)

iv

Meeting Sponsors

v

Table of Contents

vi

Sustaining Members

xiii

Honorary Lifetime Members

xiv

Steering Committee

xv

Meeting Participants

xvi

Formal Conference Contributions

KEYNOTE ADDRESS:

THE CENTER OF HORTICULTURAL RESEARCH [LE CENTRE DE RECHERCHE EN HORTICULTURE]: A MODEL OF PARTNERSHIP

A. Gosselin and R. Tweddell

1

SYMPOSIUM I: PLANT GROWTH REGULATOR-PRODUCING MICRO-ORGANISMS

PLANT HORMONES: A KEY IN CLUBROOT DEVELOPMENT

S. Devos and E. Prinsen

3

USING ARBUSCULAR MYCORRHIZAL FUNGI TO IMPROVE INPUT USE EFFICIENCY

C. Hamel

7

PROMOTION OF PLANT GROWTH BY SOIL BACTERIA THAT REGULATE PLANT ETHYLENE LEVELS

B.R. Glick

15

BIOSYNTHESIS OF PLANT HORMONES BY MICROORGANISMS

W. Rademacher

22

SESSION I: CONTRIBUTED PAPERS

GROWTH STIMULATION OF GREENHOUSE TOMATO PLANTS BY PSEUDOMONAS PUTIDA AND TRICHODERMA ATROVIRIDE

V. Gravel, H. Antoun and R. Tweddell

25

ASSESSING THE EFFECTS OF MULCH, COMPOST TEA, AND CHEMICAL FERTILIZER ON SOIL MICROORGANISMS, EARLY GROWTH, BIOMASS PARTITIONING, AND TAXANE LEVELS IN FIELD-GROWN ROOTED CUTTINGS OF CANADA YEW (TAXUS CANADENSIS)

R.F. Smith, S.I. Cameron, J. Letourneau, T. Livingstone, K. Livingstone, and K. Sanderson

27

AUXIN CONJUGATE HYDROLYSIS DURING PLANT-MICROBE INTERACTION AND EVOLUTION

J. Ludwig-Müller, A. Schuller, A.F. Olajide, V. Bakllamaja and J.J. Campanella

34

SYMPOSIUM II: ADVANCES IN PLANT GROWTH REGULATOR MODE-OF-ACTION RESEARCH

INTERACTIONS BETWEEN PGP, PIN, AND AUX/LAX AUXIN TRANSPORT PROTEINS FROM ARABIDOPSIS

J.J. Blakeslee, A. Bandyopadhyay; O. R. Lee, M. Sauer, J. Mravec, B. Titapiwatanakun, S. Makam, R. Bouchard, J. Adamec,  M. Geisler,  E. Martinoia, J. Friml, W.A. Peer and A.S. Murphy

42

ROLE OF GIBBERELLIN AND PICKLE IN DETERMINATION OF DEVELOPMENTAL IDENTITY

H.-C. Li, J. Henderson, S. D. Rider, H. Zhang, K. Chuang, Y. Bai, M. Fountain, B. Muir, and J. Ogas

50

HOW AUXIN TURNS GENES ON – REGULATED PROTEIN DEGRADATION AT THE HEART OF AUXIN SIGNALLING

S. Kepinski

51

CHEMICAL GENETIC APPROACHES TO PLANT GROWTH REGULATION

P. McCourt, Y. Tsuchiya and J. Patel

54

SESSION II: CONTRIBUTED PAPERS

REGULATION OF INFLORESCENCE MERISTEM FATE IN PEA

S.L. Maki, H. Mullen, and S.R. Singer

56

AUXIN TRANSPORT: A MODEL BASED ON VISUAL ESTIMATION OF A CROP PLANT’S PGR ACTIVITY

A. Liptay, J. H. Stoller and R.A. Salzman.

59

ACC INDUCTION OF XYLOGENESIS IN HORSERADISH ROOTS

R. A. Savidge

60

CHARACTERIZATION OF PEA (PISUM SATIVUM L.) PLANTS TRANSFORMED WITH A GIBBERELLIN 3Β-HYDROXYLASE GENE

A. Wickramarathna, J. Ozga and D. Reinecke

66

DEVELOPMENTAL REGULATION OF GA BIOSYNTHESIS DURING GERMINATION AND EARLY SEEDLING GROWTH OF PEA

B. Ayele, J. Ozga, L. Kurepin, R. Pharis and D. Reinecke

67

SYMPOSIUM III: PLANT GROWTH REGULATOR USE IN TURF AND ORNAMENTAL HORTICULTURE

MEFLUIDIDE OR ETHEPHON AND TRINEXAPAC-ETHYL FOR THE SUPRESSION OF POA ANNUA L. SEEDHEAD PRODUCTION USING GROWING DEGREE DAYS

R.N. Calhoun and A.D. Hathaway

69

GENETIC TRANSFORMATION OF CREEPING BENTGRASS WITH IPT GENE CONTROLLING CYTOKININ SYNTHESIS

B. Huang, J. Xing, Y. Xu, and T. Gianfagna

70

IMPACT OF SEAWEED EXTRACT-BASED CYTOKININS AND ZEATIN RIBOSIDE ON CREEPING BENTGRASS HEAT TOLERANCE

E.H. Ervin, X. Zhang, and G. Seaver.

71

CURRENT AND POTENTIAL USES OF PLANT GROWTH REGULATORS IN FLORICULTURE AND ORNAMENTAL PLANTS

W. A. Mackay and N. Sankhla

73

SESSION III: CONTRIBUTED PAPERS

THE DIFFERENTIAL EFFECTIVENESS OF TWO SYNTHETIC AUXINS IN DELAYING FLORET ABSCISSION IN RED CESTRUM CUT FLOWERS DEPENDS ON THEIR TRANSPORT AND METABOLISM

B. Abebie, S. Philosoph-Hadas, A. Lers, R. Goren, M. Huberman, J. Riov, S. Meir

75

DAPHNE JOAN OSBORNE

81

THE IMPACT OF GROWTH PROMOTANTS AND RETARDANTS ON SECOND CROP PRODUCTION IN DRILL-SEEDED RICE

R.T. Dunand

82

MANIPULATING TRANSPLANT MORPHOLOGY TO ADVANCE POST-TRANSPLANT GROWTH AND YIELD IN STRAWBERRY

J.Y. Reekie

84

SYMPOSIUM IV: PLANT GROWTH REGULATOR APPLICATIONS IN FRUIT AND VINE CROPS

EFFECTS OF PREHARVEST SPRAYS OF MCP AND ETHEPHON ON ‘BING’ SWEET CHERRY FRUIT LOOSENING AND FRUIT QUALITY

D.C. Elfving, A. N. Reed and D. B. Visser

86

APPLICATION OF BLOSSOM THINNERS FOR CROP LOAD MANAGEMENT IN APPLE, PEACH, AND NECTARINE

E. Fallahi and B. Fallahi

87

ETHYLENE AND PISTILLATE FLOWER ABORTION OF WALNUT

V. Polito, H. Johnson, J Grant

91

ABSCISIC ACID: A POTENTIAL TOOL FOR IMPROVING THE COLOR OF TABLE GRAPES

M.W. Fidelibus and M.C. Peppi.

92

SESSION IV: CONTRIBUTED PAPERS

DEVELOPING AND TESTING OF A MODEL TO RAPIDLY PREDICT APPLE THINNER RESPONSE.

D. W. Greene, A. N. Lakso , and T. L. Robinson

95

APPLICATION OF 2,4-D (CITRUSFIX) FOR FRUIT SIZE INCREASE OF MANDARINS AND MANDARIN HYBRIDS IN CALIFORNIA

C.T. Chao

97

PLANT GROWTH REGULATORS FOR AVOCADO PRODUCTION

C. J. Lovatt and S. Salazar-García

98

SESSION V: CONTRIBUTED PAPERS

ISOLATION OF GENES POTENTIALLY REGULATING MANGO FLOWERING

T.L. Davenport, T. Zhang, and Z. Ying

109

RETAIN® FOR WALNUT PISTILLATE FLOWER ABORTION (PFA): AN EXTENSION SUCCESS STORY

R. H. Beede and J. Grant

111

MOLECULAR CLONING AND ANALYSIS OF ORYZA SATIVA AUXIN-BINGDING PROTEIN 1 GENE

L. Xiao, R. Wang, Y. Hong and H. Jian

123

POSTER SESSION: CONTRIBUTED PAPERS

EFFECT OF AUXIN TRANSPORT INHIBITORS ON FRUIT GROWTH AND FRUIT SET OF ‘DELICIOUS’ AND ‘GOLDEN DELICIOUS’ APPLES

D. W. Greene

132

C27-BRASSINOSTEROIDS BIOSYNTHESIS IN ARABIDOPSIS THALIANA

S.-H. Joo, J.-H. Hwang, C.H. Park, H. Namgung and S.-K. Kim

136

A CHANGING INCLINATION OF ADK TOWARDS CYTOKININ ISOMERS DURING THE CELL CYCLE OF TOBACCO BY-2 CELLS

Z. Kwade, A. Swiatek, A. Azmi and H. Van Onckelen

137

ENFLUENCE OF 5-AMINOLEVULINIC ACID ON THE EFFICIENCY OF DRY- MATTER PRODUCTION IN VEGETABLE POT-SEEDLINGS

R. Yoshida, M. Sonoda, R. Konishi, K. Iwai, T. Tanaka and H. Okada

139

THE EFFECT OF ETHEPHON, NAA AND BA, USED SEPARATELY AND JOINTLY, ON THE EFFICIENCY OF THINNING IN APPLE TREES CULTIVARS JONAGOLD, GOLDEN DELICIOUS AND ELSTAR

A. Basak

144

THE EFFICIENCY OF 3,5,6-TPA USED IN APPLE AND PEAR AGAINST PREHARVEST FRUIT DROP

A. Basak and M. Buczek

151

EFFECTS OF SEAWEED EXTRACT APPLICATION ON ANTIOXIDANT PROPERTIES OF TWO DIFFERENTIALLY CHILLING-SENSITIVE CULTIVARS OF MAIZE.

D. M. Hodges, K.D. Munro, M. Elliot, S. Fillmore, and K.B. McRae

154

EFFECT OF RADIATION SPECTRAL COMPOSITION ON GERMINATION AND GROWTH OF CHESTNUT IN VITRO

S. Y. Park, H. K. Moon, M. J. Kim, H. M. Jo and Y. W. Kim

156

HORMONAL BALANCE AND PHYSIOLOGICAL BACKGROUND FOR DECISION SUPPORT ON FRUIT SET IMPROVEMENT ON PEAR TREES

S. Vanthournout, T. Deckers and R. Valcke

157

BOTH PROHEXADIONE-CA AND GA4+7 REDUCE SKIN DEFECTS OF APPLE

S. McArtney, D. Ferree, J.D. Obermiller, A. Green and J. Schmidt

160

EFFECTS OF ALTERED GROWTH ON THE PLANT HORMONES AUXIN AND GIBBERELLIN IN ARABIDOPSIS THALIANA

I. Desgagné-Penix and V. Sponsel

162

GUAVA CALLUS PRODUCTION UNDER DIFFERENT CULTURE MEDIUM AND PLANT GROWTH REGULATOR CONDITIONS

G. Yang and Z. Lu

167

ETHYLENE AS AN ALTERNATIVE METHOD IN PEACH FRUIT THINNING

A. Taheri, J. Cline, J. Subramanian  and K.P. Pauls

172

POST HARVEST PERFORMANCE AND DISPLAY LIFE OF CUT PHLOX FLOWER HEADS: EFFECT OF PROHEXADIONE-Ca

N. Sankhla and W. A. Mackay

173

EFFECT OF ETHANOL AND SUCROSE ON DISPLAY LIFE OF CUT RACEMES OF LUPINUS HAVARDII

W. A. Mackay and N. Sankhla

177

POSTHARVEST RIPENING OF ZIZIPHUS MAURITIANA FRUITS: EFFECT OF 1-METHYLCYCLOPROPENE

N. Sankhla, H. S. Gehlot, P. Agarwal, R. Choudhary and S. Joshi

181

A NEW IMMUNOSENSOR FOR RAPID DETETION OF GIBBERELLIN ACID

R. Wang, J. Li, L. Xiao and Y. Li

185

VOLATILE ETHANOL AFFECTS GERMINATION AND GROWTH OF LETTUCE, RADISH, SOYBEAN AND WHEAT SEEDS

G.W. Stutte, I. Eraso and S. Matthews

192

MIXED VS. MONOCULTURE HYDROPONIC PRODUCTION OF SALAD CROPS AT THREE CO2 CONCENTRATIONS

S.L. Edney, J.T. Richards, N.C. Yorio, M.D. Sisko, G.W. Stutte and R.M. Wheeler

193

IN VITRO SHOOT AND LEAF PROLIFERATION OF ENCYCLIA TAMPENSIS (LINDL.) ORCHIDS

M.L. Haddix and M. Glass

201

EXPERIENCE WITH CONTINUOUS USE OF PROHEXADIONE-CA OVER SEVERAL YEARS IN APPLES AND PEARS

K. van Saarloos, T. Sinnema and W. Rademacher

205

THE RELATIONSHIP BETWEEN ENHANCED CHILLING RESISTANCE AND OXIDATIVE STRESS IN MAIZE PRE-TREATED WITH SEAWEED EXTRACT

K.D. Munro, D. M. Hodges, M.L. Elliot, S. Fillmore and S.D. Hankins

206

EFFECTS OF A SOIL-APPLIED FORTIFIED ASCOPHYLLUM NODOSUM EXTRACT ON THE VISUAL QUALITY OF ZOYSIA TURFGRASS

J.P. Morales-Payan

208

POTATO TUBER YIELD AND SIZE AS AFFECTED BY A FORTIFIED SOIL-APPLIED ASCOPHYLLUM NODOSUM EXTRACT

J.P. Morales-Payan

209

GROWTH OF AROMATIC COLEUS (COLEUS AMBOINICUS LOUR.) AS AFFECTED BY BIOSTIMULATORS

J.P. Morales-Payan

210

AMINOLEVULINIC ACID EFFECTS ON THE YIELD OF WEED-FREE AND PIGWEED-INFESTED SALAD AMARANTH (AMARANTHUS TRICOLOR)

 J.P. Morales-Payan and W.M. Stall.

213

CARIBBEAN CHERRY (MALPIGHIA PUNICIFOLIA) FRUIT GROWTH AS AFFECTED BY A SPRAYED SEAWEED (ASCOPHYLLUM NODOSUM) EXTRACT

J.P. Morales-Payan

214

EXOGENOUS AMINOLEVULINIC ACID EFFECTS ON ORNAMENTAL PEPPER

J.P. Morales-Payan

215

TRIADIMEFON EFFECTS ON CORN (ZEA MAYS) GERMINATION, GROWTH, AND YIELD

J.P. Morales-Payan

216

EFFECTS OF BIOSTIMULANTS ON NURSERY GROWTH OF ORANGE BUDDED ON VOLKAMER LEMON AND SWINGLE CITRUMELO

L.M. Santana, R. Gabriel, J.P. Morales-Payan, C.H. Puello, J. Mancebo, and F. Rondón

217

PEACH FLOWER BUD THINNING BY DORMANT SEASON APPLICATIONS OF ETHEPHON PLUS VEGETOIL®

G. L. Reighard, D. R. Ouellette and K. H. Brock

220

ENDOGENOUS HORMONE CONCENTRATIONS AND BUD BREAK RESPONSE TO EXOGENOUS BA IN SHOOTS OF APPLE TREES WITH TWO GROWTH HABITS GROWN ON THREE ROOTSTOCKS

T. Tworkoski and S. Miller

225

Authors Index

226

Meeting Photos

228