SummaryThe effect of a number of apple rootstock varieties on the vigour of scion varieties budded on them was found to be related to the number of stomata per unit leaf area of rootstock leaf (stomatal density). Stomatal counts made from plastic film replicas of leaf surfaces may provide a rapid means of assessing the probable growth potential of apple seedlings. A technique for preparing the plastic film replicas is described.
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Beakbane et al. (1975) studied this question.
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