FLOWERING AND FRUIT-SET RESPONSE TO TEMPERATURE IN THE AVOCADO CULTIVAR 'HASS'
FLOWERING AND FRUIT-SET RESPONSE TO TEMPERATURE IN THE AVOCADO CULTIVAR 'HASS'
复制标题
鳄梨品种“HASS”开花和坐果对温度的响应
DOI：
10.1016/0304-4238(81)90075-3
复制
发表时间：
1981
影响因子：
4.3
通讯作者：
C. M. Annells
中科院分区：
文献类型：
--
作者：
M. Sedgley;C. M. Annells
鳄梨植物，品种'哈斯'，保持在生长柜中，33° C白天，28° C晚上（33 28）; 25° C白天，20° C晚上（25 20）;和17° C白天，12° C晚上（17 12），12小时光周期和光子通量密度为400 μE m− 2 s− 1（400-700 nm）。在33 28和25 20花开放在上午在女性阶段，并再次在下午的第二天在男性阶段（A型花周期）。在17 - 12，花开放在下午在女性阶段，并开始重新开放在男性阶段2天后的下午。他们通宵营业，第二天早上开始关门。花粉管生长和胚珠穿透发生在所有温度。花粉管生长最快的33 - 28，但雌蕊已经失去了支持花粉管生长的能力，由实验的第二周。一个较低比例的胚珠在17 - 12有一个胚囊穿透的花粉管。胚胎发育发生在所有温度下，但幼果在33 - 28和胚胎生长非常缓慢，在17 - 12。花器行为、花粉管生长和胚发育的最适温度为25 ~ 20 ℃。
Abstract Avocado plants, cultivar ‘Hass’, were kept in growth cabinets at 33° C day, 28° C night (33 28); 25° C day, 20° C night (25 20); and 17° C day, 12° C night (17 12), with a 12-h photoperiod and photon flux density of 400 μE m− 2 s− 1 (400–700 nm). At 33 28 and 25 20 flowers opened in the morning in the female stage and again in the afternoon of the following day in the male stage (Type A floral cycle). At 17 12 the flowers opened in the afternoon in the female stage and started to reopen in the male stage 2 days later during the afternoon. They remained open overnight and started to close the following morning. Pollen tube growth and ovule penetration occurred at all temperatures. Pollen tube growth was fastest at 33 28, but the pistils had lost the ability to support pollen tube growth by the second week of the experiment. A lower proportion of the ovules at 17 12 had an embryosac penetrated by a pollen tube. Embryo development occurred at all temperatures, but fruitlets were abscissed at 33 28 and embryo growth was very slow at 17 12. The most suitable temperature regime for floral behaviour, pollen tube growth and embryo development was 25 20.