Fire as a Selective Agent for both Serotiny and Nonserotiny Over Space and Time

Critical Reviews in Plant Sciences, Journal Year: 2020, Volume and Issue: 39(2), P. 140 - 172

Published: March 3, 2020

Serotiny is the prolonged storage of seeds in closed cones or fruits held within crown woody plants. It widespread throughout fireprone vegetation with a predominantly winter rainfall, especially Mediterrnanean-type ecosystems (MTEs). Nonstorage feature summer-dominant rainfall nonfireprone vegetation. confers fitness benefits on an individual when fire return intervals fall between age to reproductive maturity and plant life span. The level serotiny species varies greatly along continuum indicating highly plastic responses different environmental conditions. Here we review how why traits that underpin this syndrome evolved continue control occurrence contemporary landscapes. We documented 1345 serotinous regions Australia, South Africa, Mediterranean Basin, North America, Asia. length seed from few years (weak serotiny) >10 (strong serotiny), remarkable diversity even clades. show interplay postfire interfire seedling recruitment dictates expression strong serotiny/nonserotiny continuum, that, where favored, ‘gene support for serotiny’ builds up over successive generations. Nonserotiny favored absence occurs at exceeding longevity, but also so frequent only resprouters can survive. identify 23 associated syndromes are subject both phylogenetic constraints. While all coordinated maximum fitness, some traits, such as protection granivores, indirectly related regime. has long history extending back Triassic. rate serotinous-lineage proliferation fluctuated time peaked last 5 million years. Nonserotinous have ancestors response increased frequency, plants migrated fire-free habitats. note shifts climate, land-use, exploitation had profound, disproportionate, effect conservation status evolutionary trajectory MTEs. Escalating anthropogenic impacts increase need understand prominent ecosystems. highlight avenues future research argue use temporally based measures facilitate comparisons studies.

Language: Английский

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Global patterns of potential future plant diversity hidden in soil seed banks

Nature Communications, Journal Year: 2021, Volume and Issue: 12(1)

Published: Dec. 2, 2021

Soil seed banks represent a critical but hidden stock for potential future plant diversity on Earth. Here we compiled and analyzed global dataset consisting of 15,698 records species density soil in natural communities worldwide to quantify their environmental determinants patterns. Random forest models showed that absolute latitude was an important predictor banks. Further, climate were the major bank diversity, while net primary productivity characteristics main predictors density. Moreover, mapping revealed clear spatial patterns worldwide; instance, low densities may render currently species-rich biomes (such as tropical rain-forests) less resilient disturbances. Our assessment provides quantitative evidence how conditions shape distribution banks, which enables more accurate prediction resilience vulnerabilities under changes.

Language: Английский

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Advances in the Understanding of Reactive Oxygen Species-Dependent Regulation on Seed Dormancy, Germination, and Deterioration in Crops

Frontiers in Plant Science, Journal Year: 2022, Volume and Issue: 13

Published: Feb. 23, 2022

Reactive oxygen species (ROS) play an essential role in the regulation of seed dormancy, germination, and deterioration plants. The low level ROS as signaling particles promotes dormancy release triggers germination. Excessive accumulation causes during storage. Maintaining homeostasis plays a central crops. This study highlights current advances dry hydrated seeds research progress crosstalk between hormones involved germination crops is mainly summarized. understandings ROS-induced are reviewed. These ROS-dependent on contribute to improvement quality future.

Language: Английский

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Soil pH is an underappreciated influence on germination‐ and microbial‐based methods for reducing weed seedbanks in croplands

Weed Research, Journal Year: 2025, Volume and Issue: 65(1)

Published: Jan. 1, 2025

Abstract In cropland soils, pH is rapidly or gradually changed by crop production practices including synthetic fertilizer treatments, organic amendments, and leguminous crops. Crop that alter soil may also affect germination microbial decay of weed seeds, thereby impacting the outcomes management methods induce to reduce reservoirs seeds in (i.e., seedbanks). To gain insight into putative relationships between efficacies seedbank reduction methods, we evaluated published studies related influence on seed decay. Based our review, suggest germination‐based for diminishing seedbanks are most effective when implemented ways either prevent immediate changes transitions neutral pH. Microbial‐based reducing be if with This because increases availability mineral nutrients required microorganisms minimizes heavy metals potentially toxic microorganisms. Although further study needed, this literature review suggests optimization involves consideration cause quick temporary, gradual lasting,

Language: Английский

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Molecular mechanisms and ecological function of far‐red light signalling

Plant Cell & Environment, Journal Year: 2017, Volume and Issue: 40(11), P. 2509 - 2529

Published: Jan. 19, 2017

Abstract Land plants possess the ability to sense and respond far‐red light (700–760 nm), which serves as an important environmental cue. Due nature of light, it is not absorbed by chlorophyll thus enriched in canopy shade will also penetrate deeper into soil than other visible wavelengths. Far‐red responses include regulation seed germination, suppression hypocotyl growth, induction flowering accumulation anthocyanins, depend on one member phytochrome photoreceptor family, A (phyA). Here, we review current understanding underlying molecular mechanisms how through phyA physiological this quality. Light‐activated phytochromes act two primary pathways within nucleus; E3 ubiquitin ligase complex CUL4/DDB1 COP1/SPA inactivation PHYTOCHROME INTERACTING FACTOR (PIF) family bHLH transcription factors. These integrate with signal transduction pathways, including phytohormones, for tissue developmental stage specific responses. Unlike that mediate red‐light responses, transported from cytoplasm nucleus shuttle proteins FAR‐RED ELONGATED HYPOCOTYL 1 (FHY1) FHY1‐LIKE (FHL). However, additional must exist shift action light; hypotheses are discussed.

Language: Английский

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