ABSTRACT Alternate bearing of ‘Hass’ avocado (Persea americana Mill.) trees is a phenomenon across avocado-growing regions around the world. In New Zealand, the cycle can be more complex as the fruit often remains on the trees for over 12 months, potentially resulting in competition for resources between fruit from the previous year and the flowers. This work looks at the impact of the presence of a 12-month-old heavy crop on the accumulation of boron and carbohydrates to flowers. By sequencing and measuring the expression of the avocado Trehalose Phosphate Synthesis (TPS1) gene, we report on the effects of cropping cycle on the delivery of carbohydrates to the flower. Differences in sugar delivery rate to the flower reflected by differences in TPS1 expression were not reflected in the carbohydrate and boron contents of open flowers, and it is suggested that flowers require a certain amount of sugars to accumulate to enable their development and to reach a stage where they are able to open as a female flower.

中文翻译：

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用于评估“哈斯”鳄梨树成熟果实和开放花朵之间资源竞争的潜在标记的生化和分子分析

摘要 'Hass' 鳄梨（Persea americana Mill.）树的交替轴承是世界各地鳄梨种植区的一种现象。在新西兰，这个周期可能更加复杂，因为果实通常会在树上停留 12 个月以上，这可能会导致前一年的果实与花朵之间的资源竞争。这项工作着眼于 12 个月大的重茬作物的存在对硼和碳水化合物在花朵中的积累的影响。通过测序和测量鳄梨海藻糖磷酸合成 (TPS1) 基因的表达，我们报告了种植周期对向花朵输送碳水化合物的影响。由 TPS1 表达差异所反映的对花的糖传递率的差异并未反映在开放花的碳水化合物和硼含量上，