
TY  - JOUR
A1  - Klages, Karin 
A1  - Donnison, Helen 
A1  - Boldingh, Helen 
A1  - MacRae, Elspeth 
T1  - <emph type="2">myo</emph>-Inositol is the major sugar in <emph type="2">Actinidia arguta</emph> during early fruit development
JF  - Functional Plant Biology
JO  - Functional Plant Biol.
Y1  - 1998
VL  - 25
IS  - 1
SP  - 61
EP  - 68
KW  - kiwifruit, sucrose, myo-inositol, fruit development, phloem.
UR  - https://doi.org/10.1071/PP97052 
N2  - Actinidia arguta (Sieb. et Zucc.) Planch. ex Miq. is a cold tolerant and heavy cropping species from the kiwifruit [Actinidia deliciosa var. deliciosa (A. Chev.) C.F. Liang et A.R.Ferguson] family that has potential for commercialisation. As fruit developed, glucose was the major sugar (74%) in A. deliciosa during the first 40 days after anthesis, whereas myo-inositol was the major sugar (60&#x2013;65%) in A. arguta.myo-Inositol accumulated rapidly in A. arguta during the first 20&#x2013;30 daa then more slowly as fruit grew to reach a steady state level, between 15 and 50 mg fruit-1 for different selections. Peak levels were 55-60 mg g-1 dry wt. In contrast, maximum myo-inositol concentrations in A. deliciosa were only 18 mg g-1 dry wt. As fruit of A. arguta ripened, sucrose became the dominant sugar. In contrast to the fruit, myo-inositol concentrations were lower in leaves of A. arguta(~5 mg g-1 dry wt; ~10% of major sugars) than in leaves of A. deliciosa (15 mg g-1 dry wt; ~20% of major sugars). To ascertain whether myo-inositol was transported from the leaves to the fruit in the phloem stream, exudates were also analysed. In both species, sucrose was the predominant sugar (>95%) in the phloem. Therefore we suggest that an unusual accumulation of myo-inositol in A. arguta during early stages of fruit development, may be due to synthesis in the fruit. 
ER  -

