Ahsan Muhammad Umair, Barbier Francois, Hayward Alice, Powell Rosanna, Hofman Helen, Parfitt Siegrid Carola, Wilkie John, Beveridge Christine Anne, Mitter Neena
Queensland Alliance for Agriculture and Food Innovation, The University of Queensland, Brisbane, QLD 4072, Australia.
School of Biological Sciences, The University of Queensland, Brisbane, QLD 4072, Australia.
Plants (Basel). 2023 Jun 13;12(12):2304. doi: 10.3390/plants12122304.
Reproductively mature horticultural trees undergo an annual flowering cycle that repeats each year of their reproductive life. This annual flowering cycle is critical for horticultural tree productivity. However, the molecular events underlying the regulation of flowering in tropical tree crops such as avocado are not fully understood or documented. In this study, we investigated the potential molecular cues regulating the yearly flowering cycle in avocado for two consecutive crop cycles. Homologues of flowering-related genes were identified and assessed for their expression profiles in various tissues throughout the year. Avocado homologues of known floral genes , , , , , and / were upregulated at the typical time of floral induction for avocado trees growing in Queensland, Australia. We suggest these are potential candidate markers for floral initiation in these crops. In addition, and , which are associated with endodormancy, were downregulated at the time of floral bud break. In this study, a positive correlation between activation and in avocado leaves to regulate flowering was not seen. Furthermore, the model described in annual plants appears to be conserved in avocado. Lastly, no correlation of juvenility-related miRNAs miR156, miR172 with any phenological event was observed.
生殖成熟的园艺树木会经历一个年度开花周期，这个周期在它们的整个生殖生命周期中每年重复出现。这个年度开花周期对园艺树木的生产力至关重要。然而，像鳄梨这样的热带果树作物中，开花调控背后的分子事件尚未得到充分了解或记录。在本研究中，我们连续两个作物周期研究了调控鳄梨年度开花周期的潜在分子线索。鉴定了与开花相关基因的同源物，并评估了它们在全年不同组织中的表达谱。在澳大利亚昆士兰州生长的鳄梨树典型的花芽诱导时期，已知花卉基因、、、、、和/的鳄梨同源物上调。我们认为这些是这些作物花芽起始的潜在候选标记。此外，与内休眠相关的和在花芽萌发时下调。在本研究中，未观察到鳄梨叶片中激活与调控开花之间的正相关关系。此外，一年生植物中描述的模型在鳄梨中似乎是保守的。最后，未观察到与幼年期相关的miR156、miR172与任何物候事件的相关性。
