Computational Molecular Biology 2025, Vol.15, No.1, 38-52 http://bioscipublisher.com/index.php/cmb 39 be activated in its body. It's not a single gene at work, but rather transcription factor families like AP2/ERF and WRKY are engaged in a coordinated battle (Xue et al., 2022). They are like the conductors of an orchestra, regulating physiological activities such as hormone signals and sugar metabolism. Interestingly, although the coping methods for different stresses have their own focuses, they basically cannot bypass the process of reactive oxygen species scavenging (Liu et al., 2022). Of course, these molecular-level changes will eventually be reflected in the stress resistance of the plants, enabling the crops to survive in harsh environments (Raza et al., 2021). We conducted this research precisely to figure out what mechanism rapeseed relies on to withstand various environmental pressures. At present, transcription factors such as AP2/ERF and WRKY have indeed been confirmed to be involved, but in the final analysis, these are just the tip of the iceberg. What exactly does the entire regulatory network look like? Which links are the most crucial? It's still a fog now. The goal this time is to thoroughly review the existing research results and see if we can piece together a relatively complete map. If one is lucky, perhaps a few nodes with strong control can really be identified-then in the future, when breeding, there will be a direction and focus for improvement. In fact, increasing production is one aspect. What is more crucial is to ensure that rapeseed can remain stable in the context of unstable and even increasingly extreme climate, which is of great significance for food security. However, it must be admitted that the stress resistance mechanism of plants is indeed rather complex, and different stresses often interweave and influence each other. Therefore, clarifying these relationships is not something that can be achieved overnight; it requires a gradual process. 2 Transcriptional Regulatory Mechanisms in Plants 2.1 Basics of gene expression and transcription factors The gene regulation of plants is actually quite like a multi-level circuit system. Which gene and when it starts working are all scheduled by a set of "instructions". The most crucial role in this system is undoubtedly the transcription factors-they are like precise identifiers that can target specific DNA fragments to initiate reactions. Take rapeseed as an example. There is a transcription factor family called GARP, which is particularly active when the plant is deficient in nutrients (Hua et al., 2022). Members like BnaA9.HHO1 and BnaA1.HHO5 (Figure 1) can be regarded as emergency response centers during nutritional stress. But nutrient deficiency is only one of the problems. When drought or soil salinization occurs, it's the turn of the NF-Y family to step in. This type of transcription factor is composed of three different subunits that work together to help plants survive the difficult times. Interestingly, although they seem to be responsible for different tasks respectively, once multiple stresses occur simultaneously, these "independent" factors will also join forces to form more complex regulatory responses. 2.2 Regulatory elements in plant genomes To understand how plants regulate genes, it is not enough to just look at the genes themselves; one also needs to pay attention to those unremarkable "accessories"-regulatory regions like promoters and enhancers, which are the ones that truly control the switches of genes. Take rapeseed as an example. The promoter region of the GARP family genes is quite interesting. There are many regulatory loci related to growth and stress response distributed in it (Hua et al., 2022). These sites are like pre-set buttons. As soon as there is any movement from the outside world, the transcription factors can find them immediately and start a response. Interestingly, the "operation methods" of different gene families are indeed not the same. For instance, the protein structures of several subunits of NF-Y and some transcription factors related to plant hormones have not changed much during evolution, indicating that their functions are indeed stable and crucial (Wang et al., 2020). Recently, it has also been discovered that gene families like BnLTP are quite special. Their DNA sequences contain a type of "sensing element" that can recognize external stress. When drought or pests and diseases occur, these genes can respond quickly. 2.3 Role of transcriptional networks in development and stress responses The gene regulatory network within plants is indeed complex. It's somewhat like a huge symphony orchestra, with each "musician"-that is, the transcription factor-doing their own job, but they also have to work in perfect
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