Table I. List of 45 species used in the survey.

Apo (s), Apoplastic loading of Suc (s); Apo (s+sa), apoplastic loading of Suc (s) and sugar alcohol (sa); GF, growth form; H, herbaceous plants; LT, loading type; Pas (s), passive loading of Suc; Pas (s+sa), passive loading of Suc and sugar alcohol; PT (s), polymer trapping of Suc; T, trees. In group PT (mix), Catalpa loads Suc alone and Fraxinus and Syringa load both Suc and mannitol.

Species	Family	GF	LT
Helianthus annuus	Asteraceae	H	Apo
Solanum lycopersicum	Solanaceae	H	(s)
Nicotiana rustica	Solanaceae	H
Phaseolus vulgaris	Fabaceae	H
Salvia officinalis	Lamiaceae	H
Solanum tuberosum	Solanaceae	H
Buddleja davidii	Scrophulariaceae	H	PT
Coleus blumei	Lamiaceae	H	(s)
Cucumis sativus	Cucurbitaceae	H
Cucurbita maxima	Cucurbitaceae	H
Cucurbita moschata	Cucurbitaceae	H
Verbascum phoeniceum	Scrophulariaceae	H
Alchemilla mollis	Rosaceae	H	Pas
Filipendula vulgaris	Rosaceae	H	(s)
Fragaria ananassa	Rosaceae	H
Potentilla erecta	Rosaceae	H
Sanguisorba officinalis	Rosaceae	H
Apium graveolens	Apiaceae	H	Apo
Penstemon digitalis	Scrophulariaceae	H	(s+sa)
Plantago major	Plantaginaceae	H
Veronica spicata	Scrophulariaceae	H
Alnus glutinosa	Betulaceae	T	Apo
Halesia tetraptera	Styracaceae	T	(s)
Liquidambar styraciflua	Hamamelidaceae	T
Liriodendron tulipifera	Magnoliaceae	T
Phellodendron lavallei	Rutaceae	T
Cercidiphyllum japonicum	Cercidiphyllaceae	T	Pas
Corylus colurna	Betulaceae	T	(s)
Fagus sylvatica	Fagaceae	T
Juglans ailanthifolia	Juglandaceae	T
Platanus acerifolia	Platanaceae	T
Populus alba	Salicaceae	T
Quercus coccinea	Fagaceae	T
Amelanchier laevis	Rosaceae	T	Pas
Malus domestica	Rosaceae	T	(s+sa)
Prunus armeniaca	Rosaceae	T
Prunus avium	Rosaceae	T
Prunus cerasus	Rosaceae	T
Prunus domestica	Rosaceae	T
Prunus persica	Rosaceae	T
Pyrus communis	Rosaceae	T
Spiraea japonica	Rosaceae	T
Catalpa speciosa	Bignoniaceae	T	PT
Fraxinus americana	Oleaceae	T	(mix)
Syringa reticulata	Oleaceae	T