Programmed cell death (PCD) is a genetically controlled pathway that plants can use to selectively eliminate redundant or damaged cells. In addition to its fundamental role in plant development, PCD can often be activated as an essential defense response when dealing with biotic and abiotic stresses. For example, localized, tightly controlled PCD can promote plant survival by restricting pathogen growth, driving the development of morphological traits for stress tolerance such as aerenchyma, or triggering systemic pro-survival responses. Relatively little is known about the molecular control of this essential process in plants, especially in comparison to well-described cell death models in animals. However, the networks orchestrating transcriptional regulation of plant PCD are emerging. Transcription factors (TFs) regulate the clusters of stimuli inducible genes and play a fundamental role in plant responses, such as PCD, to abiotic and biotic stresses. Here, we discuss the roles of different classes of transcription factors, including members of NAC, ERF and WRKY families, in cell fate regulation in response to environmental stresses. The role of TFs in stress-induced mitochondrial retrograde signaling is also reviewed in the context of life-and-death decisions of the plant cell and future research directions for further elucidation of TF-mediated control of stress-induced PCD events are proposed. An increased understanding of these complex signaling networks will inform and facilitate future breeding strategies to increase crop tolerance to disease and/or abiotic stresses.

Both auxin signalling and programmed cell death (PCD) are essential components of a normally functioning plant. Auxin underpins plant growth and development, as well as regulating plant defences against environmental stresses. PCD, a genetically controlled pathway for selective elimination of redundant, damaged or infected cells, is also a key element of many developmental processes and stress response mechanisms in plants. An increasing body of evidence suggests that auxin signalling and PCD regulation are often connected. While generally auxin appears to suppress cell death, it has also been shown to promote PCD events, most likely via stimulation of ethylene biosynthesis. Intriguingly, certain cells undergoing PCD have also been suggested to control the distribution of auxin in plant tissues, by either releasing a burst of auxin or creating an anatomical barrier to auxin transport and distribution. These recent findings indicate novel roles of localized PCD events in the context of plant development such as control of root architecture, or tissue regeneration following injury, and suggest exciting possibilities for incorporation of this knowledge into crop improvement strategies.

Societal Impact Statement Plants are indispensable to life on Earth. Securing our future requires protecting plant biodiversity and the development of climate‐resilient crops. Activities fostering public appreciation of plant science, and promoting plant‐related professions, are therefore critical. These efforts can be hindered by plant awareness disparity, manifesting as difficulty in recognizing the presence and importance of plants. However, interest in plants as a hobby and as lifestyle elements has rapidly increased in younger demographics over the last decade. We suggest these topics should be exploited urgently by researchers and educators to increase further the reach of science communication, thereby enhancing societal awareness of botany and stimulating interest in plant‐related degrees and career pathways. Summary Plants are the basis of life on Earth as we know it and the study of plants is essential to protect our future. Yet botany and plant science are in crisis and suffer a low uptake at the level of undergraduate degrees. Increasing science communication about exciting advances in our knowledge of plants and their importance to society may be a strategy to counteract this. Here, we comment on the recent trends in the public perception of plants and explore them using infoveillance tools. Our observations highlight that paradoxically over the last decade public interest in plant‐related topics has increased considerably, with the advent of a new type of social media influencer—‘plantfluencers’. Additionally, recent studies demonstrate that the COVID‐19 pandemic has boosted awareness of the therapeutic value of interacting with plants and their positive effect on human well‐being. We suggest that this offers a window of opportunity to develop an appreciation of plant science among the wider public, who are reconnecting with plants in new ways. Plant‐focused communities and online groups on social media platforms can facilitate engagement with new audiences. In particular, trends relating to houseplants, plant‐based diets and the benefits of interacting with plants on mental health and well‐being together provide an attractive springboard for science outreach and botany‐focused conversations. Here, we discuss these trends and make recommendations for researchers and educators.

Programmed cell death (PCD) facilitates targeted elimination of redundant, damaged, or infected cells via genetically controlled pathways. In plants, PCD is often an essential component of normal development and can also mediate responses to abiotic and biotic stress stimuli. However, studying the transcriptional regulation of this fundamental process is hindered by difficulties in sampling small groups of cells undergoing PCD that are often buried within the bulk of living plant tissue. We addressed this challenge by using RNA sequencing (RNA-Seq) of Arabidopsis thaliana suspension cells, a system that allows precise monitoring of PCD activation and progression. The use of three PCD-inducing treatments (salicylic acid, heat and critical dilution), in combination with three cell death modulators (3-methyladenine, lanthanum chloride and conditioned medium), allowed isolation of candidate core and stimuli-specific PCD genes, inference of underlying gene regulatory networks and identification of putative transcriptional regulators. This analysis underscored cell cycle disturbance and the repression of both pro-survival stress responses and mitochondrial retrograde signalling as key elements of the PCD-associated transcriptional signature in plants. Further, phenotyping of twenty Arabidopsis T-DNA insertion mutants in selected candidate genes confirmed a role for several in PCD and stress tolerance regulation, and validated the potential of these generated resources to identify novel genes involved in plant PCD pathways and/or stress tolerance in plants.

SUMMARYProgrammed cell death (PCD) facilitates selective, genetically controlled elimination of redundant, damaged, or infected cells. In plants, PCD is often an essential component of normal development and can mediate responses to abiotic and biotic stress stimuli. However, studying the transcriptional regulation of PCD is hindered by difficulties in sampling small groups of dying cells that are often buried within the bulk of living plant tissue. We addressed this challenge by using RNA sequencing and Arabidopsis thaliana suspension cells, a model system that allows precise monitoring of PCD rates. The use of three PCD‐inducing treatments (salicylic acid, heat, and critical dilution), in combination with three cell death modulators (3‐methyladenine, lanthanum chloride, and conditioned medium), enabled isolation of candidate core‐ and stimuli‐specific PCD genes, inference of underlying regulatory networks and identification of putative transcriptional regulators of PCD in plants. This analysis underscored a disturbance of the cell cycle and mitochondrial retrograde signaling, and repression of pro‐survival stress responses, as key elements of the PCD‐associated transcriptional signature. Further, phenotyping of Arabidopsis T‐DNA insertion mutants in selected candidate genes validated the potential of generated resources to identify novel genes involved in plant PCD pathways and/or stress tolerance.