Blumenfeld A, Gazit S
Department of Horticulture, The Volcani Institute of Agricultural Research, Bet Dagan, Israel.
Plant Physiol. 1970 Aug;46(2):331-3. doi: 10.1104/pp.46.2.331.
The soybean callus bioassay was used to determine levels of cytokinin activity in avocado (Persea americana) seeds.In the embryo, levels are high during the early stages of development, but diminish as the fruit grows. The level of cytokinin activity in the endosperm is very high throughout the period that this tissue exists. The seed coats have very high activity levels while the fruit is young, reaching values comparable with those found in the endosperm. The activity level falls as the rate of fruit growth slows down and disappears completely by the time the seed coats shrivel at approximately the same time the fruit reaches "horticultural maturity".
采用大豆愈伤组织生物测定法来测定鳄梨（Persea americana）种子中细胞分裂素的活性水平。在胚胎中，细胞分裂素活性水平在发育早期较高，但随着果实生长而降低。在胚乳存在的整个时期，其细胞分裂素活性水平都非常高。果实幼嫩时，种皮的活性水平很高，达到与胚乳相当的值。随着果实生长速率减缓，种皮的活性水平下降，当种皮萎缩且果实大约达到“园艺成熟度”时，种皮的活性水平完全消失。
