Computational Molecular Biology 2025, Vol.15, No.1, 38-52 http://bioscipublisher.com/index.php/cmb 42 It is also a MYB family, but it is responsible for osmotic stress, that is, it helps the seedlings to hold up when there is a lack of water. Interestingly, although these factors belong to the same family, the "business" they are responsible for varies greatly, just like colleagues in the same department who are in charge of different projects. They each perform their own duties while also cooperating with each other, jointly building a defense system for rapeseed to deal with various environmental challenges. The transcription factors of the WRKY family are truly all-round players. They can be seen in almost every stage of the growth and development of rapeseed. For example, WRKY6, although the research data are from Arabidopsis thaliana (Song et al., 2020), is likely to play a similar role in rapeseed oil synthesis. Even more remarkable is WRKY46 (Ding et al., 2015), which can simultaneously regulate both ABA and auxin signaling pathways, helping plants grow more lateral roots to absorb water in saline-alkali or arid environments. The most interesting aspect of the WRKY family lies in their "social skills" (Jiang et al., 2017; Wani et al., 2021)-When subjected to stress such as drought or high temperature, they can not only rapidly adjust their own gene expression, but also act in conjunction with other transcription factors. Speaking of this, it has to be mentioned that although MYB and WRKY are good at different tasks respectively, they cooperate quite well in helping rapeseed adapt to environmental stress (Khoso et al., 2022), almost like an emergency response team within the plant. 4 Transcriptional Networks in Rapeseed Flowering and Reproductive Development 4.1 Regulatory pathways influencing flowering time The flowering time of rapeseed is not something that can be determined casually. Behind it lies a complex regulatory network. It is quite surprising that homologues of genes such as VIN3 and FUL have developed new functions in rapeseed (Shah et al., 2018). Through genome-wide scanning, scientists identified 55 key regions affecting flowering time (Li et al., 2018a), among which the most notable ones included genes such as BnaC03g32910D (CO) and BnaA02g12130D (FT). These genes each have their own responsibilities-some are responsible for sensing the length of daylight, some process low-temperature signals, and others are related to the gibberellin pathway. However, the most troublesome thing is that they always like to go against each other. For instance, BnaA03g13630D (FLC) is particularly fond of going against other genes. It is no wonder that the flowering time of rape is always difficult to predict. There are simply too many regulatory pathways involved. Just considering the signals such as photoperiod, vernalization and circadian rhythm is complex enough. The regulatory mechanism of the flowering time of rapeseed has become increasingly fascinating with further research. For instance, the 14-3-3 protein BnGF14-2c (Figure 2) (Fan et al., 2022) can actually promote flowering through the vernalization pathway in semi-winter rapeseed, and it also interacts closely with flowering regulatory factors such as BnFT.A02 and BnFLC.A10. What's more interesting is the small RNA miR156 (Wang, 2014), which regulates the SPL transcription factor to ensure that the plant flowers at the right time and can survive even in less than ideal environments. When it comes to fine control, RNA-binding proteins such as AtGRP7 and AtGRP8 (Steffen et al., 2019) cannot be overlooked. They specifically prune the mRNA of flowering inhibitory factors such as FLC with the precision of a gardener pruning. These findings suggest that the flowering of rapeseed is not determined by a single path, but rather is the result of various molecules "showing their unique abilities"-some are responsible for vernalization, some for age control, and others specifically for splicing regulation, ultimately converging into a complex regulatory network. 4.2 Transcriptional control of floral organ development The mystery of rape flowering actually lies in the meticulous regulation of the development of its flower organs. Transcription factors like LFY and AP1 (Winter et al., 2015) are like the conductors of a band, controlling the major transition from vegetative growth to flowering. Interestingly, they not only directly regulate flowering genes, but also involve the expression of hormone signaling and substance transportation-related genes (Wils and Kaufmann, 2017). As a result, a phenomenon emerged-different regulatory pathways would "connect" with each other, hormone signals might unexpectedly affect the flowering time, and material transport might change the morphology of flower organs. Although this complex network increases the difficulty of research, it precisely reflects the wisdom of plants in flexibly responding to the environment.
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