Staff Profile

Dr Grant Thorp
Senior Scientist

More information about our research

Dr Grant Thorp


BSc, Botany, The University of Auckland, New Zealand
PhD, Horticultural Science, The University of Adelaide, Australia

Research Interests & Activities

Orchard and plantation systems research for kiwifruit and avocados. Plant architecture. Canopy management and influence of cultural practices on preharvest and postharvest fruit quality. Rootstock and root system effects on plant growth and productivity.  Alternate bearing in avocado. Production and quality of Kiwiberry (Actinidia arguta). 

Honours & Awards

2008                ISAT Science and Technology Linkages Award
2002                HortResearch Chairman’s Award for Outstanding Achievement
1995                NZ Horticultural Science Advancement Trust Award
1995                NZ/USA Cooperative Science Program Award
1993                Travel Award, NZ Fruitgrowers’ Federation Charitable Trust
1990                Australian Postgraduate Research Award
1989                DSIR Study Award and Queen Elizabeth II Technicians Study Award
1987                Lincoln College Foundation Award, Lincoln College
1987                Clark/Fletcher Memorial Bursary, NZ Fruitgrowers’ Federation
1985                CIES Scholarship, French Government

Professional Memberships

Foundation member, NZ Society for Horticultural Science (now NZIAHS)
Chairman, Auckland Section NZIAHS
Member International Society for Horticultural Science (ISHS)

Key Publications

Thorp TG, Bieleski RL 2002.  Feijoas: Origins, Cultivation and Uses. David Bateman Ltd., Auckland: 87pp.

Minchin PEH, Thorp TG, Boldingh HL, Gould N, Cooney JM, Negm FB, Focht E, Arpaia ML, Hu H, Brown P. 2012. Mechanism for phloem transport of boron in avocado trees.  Journal of Horticultural Science and Biotechnology 87 (1): 23–28.

Clearwater MJ, Luo Z, Ong Eng Chye S, Blattmann P, Thorp TG. 2012. Vascular functioning and the water balance of ripening kiwifruit (Actinidia chinensis) berries. Journal of Experimental Botany 63(5): 1835–1847.

Seleznyova AN, Tustin DS and Thorp TG 2008. Apple Dwarfing Rootstocks and Interstocks Affect the Type of Growth Units Produced during the Annual Growth Cycle: Precocious Transition to Flowering Affects the Composition and Vigour of Annual Shoots. Annals of Botany: 101 (5) April: 679-688.

Thorp TG, Boyd LM, Barnett AM, Lowe RG, Hofstee BJ, Blattman PJ, Clearwater MJ 2007. Effect of inter-specific rootstocks on inorganic nutrient concentrations and fruit quality in 'Hort16A' kiwifruit (Actinidia chinensis Planch. var. chinensis) Journal of Horticultural Science & Biotechnology 82(6): 829-838.

Clearwater MJ, Seleznyova AN, Thorp TG, Blattmann P, Barnett AM, Lowe RG, Austin PT 2006.  Vigor-controlling rootstocks affect early shoot growth and leaf area development of kiwifruit. Tree Physiology 26 (4): 505-515.

Thorp TG, Barnett AM and Miller SA 2003. Effects of cane size and pruning system on shoot growth, flowering and productivity of ‘Hayward’ kiwifruit vines. Journal of Horticultural Science and Biotechnology 78 (2): 219-224.

Ferguson IB, Thorp TG, Barnett A, Boyd LM and Triggs CM 2003. Inorganic nutrient concentrations and physiological pitting in ‘Hayward’ kiwifruit. Journal of Horticultural Science and Biotechnology 78 (4): 497-504.

Thorp TG, Ferguson IB, Boyd LM and Barnett AM 2003. Fruiting position, mineral concentration and incidence of physiological pitting in ‘Hayward’ kiwifruit. Journal of Horticultural Science and Biotechnology 78 (4): 504-511.

Seleznyova AN, Thorp TG, White M, Tustin S and Costes E 2003. Application of architectural analysis and AMAPmod methodology to study dwarfing phenomenon: the branch structure of ‘Royal Gala’ apple grafted on dwarfing and non-dwarfing rootstock/interstock combinations. Annals of Botany 91: 665-672.

Seleznyova AN, Thorp TG, Barnett AM, Costes E 2002. Quantitative analysis of shoot development and branching patterns in Actinidia. Annals of Botany 89: 471-482.

Miller SA, Broom FD, Thorp TG, Barnett AM 2001. Effects of leader pruning on vine architecture, productivity and fruit quality in kiwifruit (Actinidia deliciosa cv. Hayward). Scientia Horticulturae (91)3-4: 189-199.

Thorp TG and Stowell B 2001. Effect of pruning height and selective limb removal on yield of large ‘Hass’ avocado trees. HortScience, 36 (4): 699-702.

Thorp TG, Aspinall D and Sedgley M 1994. Preformation of node number in vegetative and reproductive proleptic shoot modules of Persea (Lauraceae). Annals of Botany 73 (1): 13-22.

Thorp TG, Aspinall D and Sedgley M 1993. Influence of shoot age on floral development and early fruit set in avocado (Persea americana Mill.) cv 'Hass'. Journal of Horticultural Science 68(5): 645-651.

Thorp TG and Sedgley M 1993. Architectural analysis of tree form in a range of avocado cultivars. Scientia Horticulturae 53: 85-98.

Thorp TG and Sedgley M 1993. Manipulation of shoot growth patterns in relation to early fruit set in 'Hass' avocado (Persea americana Mill.). Scientia Horticulturae 56: 147-156.

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