journal article
LitStream Collection
Home
Towers, Isaac R.; Vesk, Peter A.; Wenk, Elizabeth H.; Gallagher, Rachael V.; Windecker, Saras M.; Wright, Ian J.; Falster, Daniel S.
doi: 10.1111/nph.19478pmid: 38135654
Delory, Benjamin M.; Callaway, Ragan M.; Semchenko, Marina
doi: 10.1111/nph.19490pmid: 38124274
By modifying the biotic and abiotic properties of the soil, plants create soil legacies that can affect vegetation dynamics through plant–soil feedbacks (PSF). PSF are generally attributed to reciprocal effects of plants and soil biota, but these interactions can also drive changes in the identity, diversity and abundance of soil metabolites, leading to more or less persistent soil chemical legacies whose role in mediating PSF has rarely been considered. These chemical legacies may interact with microbial or nutrient legacies to affect species coexistence. Given the ecological importance of chemical interactions between plants and other organisms, a better understanding of soil chemical legacies is needed in community ecology. In this Viewpoint, we aim to: highlight the importance of belowground chemical interactions for PSF; define and integrate soil chemical legacies into PSF research by clarifying how the soil metabolome can contribute to PSF; discuss how functional traits can help predict these plant–soil interactions; propose an experimental approach to quantify plant responses to the soil solution metabolome; and describe a testable framework relying on root economics and seed dispersal traits to predict how plant species affect the soil metabolome and how they could respond to soil chemical legacies.
Mankotia, Samriti; Jakhar, Pooja; Satbhai, Santosh B.
doi: 10.1111/nph.19516pmid: 38178773
ELONGATED HYPOCOTYL 5 (HY5), a bZIP‐type transcription factor, is a master regulator of light‐mediated responses. ELONGATED HYPOCOTYL 5 binds to the promoter of c. 3000 genes, thereby regulating various physiological and biological processes, including photomorphogenesis, flavonoid biosynthesis, root development, response to abiotic stress and nutrient homeostasis. In recent decades, it has become clear that light signaling plays a crucial role in promoting nutrient uptake and assimilation. Recent studies have revealed the molecular mechanisms underlying such encouraging effects and the crucial function of the transcription factor HY5, whose activity is regulated by many photoreceptors. The discovery that HY5 directly activates the expression of genes involved in nutrient uptake and utilization, including several nitrogen, iron, sulphur, phosphorus and copper uptake and assimilation‐related genes, enhances our understanding of how light signaling regulates uptake and utilisation of multiple nutrients in plants. Here, we review recent advances in the role of HY5 in light‐dependent nutrient uptake and utilization.
Quiroz, Luis Felipe; Gondalia, Nikita; Brychkova, Galina; McKeown, Peter C.; Spillane, Charles
doi: 10.1111/nph.19523pmid: 38180262
In planta haploid induction (HI), which reduces the chromosome number in the progeny after fertilization, has garnered increasing attention for its significant potential in crop breeding and genetic research. Despite the identification of several natural and synthetic HI systems in different plant species, the molecular and cellular mechanisms underlying these HI systems remain largely unknown. This review synthesizes the current understanding of HI systems in plants (with a focus on genes and molecular mechanisms involved), including the molecular and cellular interactions which orchestrate the HI process. As most HI systems can function across taxonomic boundaries, we particularly discuss the evidence for conserved mechanisms underlying the process. These include mechanisms involved in preserving chromosomal integrity, centromere function, gamete communication and/or fusion, and maintenance of karyogamy. While significant discoveries and advances on haploid inducer systems have arisen over the past decades, we underscore gaps in understanding and deliberate on directions for further research for a more comprehensive understanding of in vivo HI processes in plants.
Zhang, Baofeng; Wang, Zhuwen; Dai, Xiufang; Gao, Jinghui; Zhao, Jinfeng; Ma, Rong; Chen, Yanjie; Sun, Yi; Ma, Hongyan; Li, Shuang; Zhou, Chenguang; Wang, Jack P.; Li, Wei
doi: 10.1111/nph.19481pmid: 38095236
Histone H3 lysine‐4 trimethylation (H3K4me3) activating drought‐responsive genes in plants for drought adaptation has long been established, but the underlying regulatory mechanisms are unknown. Here, using yeast two‐hybrid, bimolecular fluorescence complementation, biochemical analyses, transient and CRISPR‐mediated transgenesis in Populus trichocarpa, we unveiled in this adaptation a regulatory interplay between chromatin regulation and gene transactivation mediated by an epigenetic determinant, a PtrSDG2‐1–PtrCOMPASS (complex proteins associated with Set1)‐like H3K4me3 complex, PtrSDG2‐1–PtrWDR5a‐1–PtrRbBP5‐1–PtrAsh2‐2 (PtrSWRA). Under drought conditions, a transcription factor PtrAREB1‐2 interacts with PtrSWRA, forming a PtrSWRA–PtrAREB1‐2 pentamer, to recruit PtrSWRA to specific promoter elements of drought‐tolerant genes, such as PtrHox2, PtrHox46, and PtrHox52, for depositing H3K4me3 to promote and maintain activated state of such genes for tolerance. CRISPR‐edited defects in the pentamer impaired drought tolerance and elevated expression of PtrHox2, PtrHox46, or PtrHox52 improved the tolerance as well as growth in P. trichocarpa. Our findings revealed the identity of the underlying H3K4 trimethyltransferase and its interactive arrangement with the COMPASS for catalysis specificity and efficiency. Furthermore, our study uncovered how the H3K4 trimethyltransferase–COMPASS complex is recruited to the effector genes for elevating H3K4me3 marks for improved drought tolerance and growth/biomass production in plants.
Showing 1 to 10 of 33 Articles