Review
Plant Sciences
Aniruddha Maity, Amrit Lamichaney, Dinesh Chandra Joshi, Ali Bajwa, Nithya Subramanian, Michael Walsh, Muthukumar Bagavathiannan
Summary: Seed shattering is a natural phenomenon in wild and weedy plant species, controlled by genetics but influenced by environmental conditions and management practices. While undesirable in domesticated crops, it serves as a crucial survival mechanism for weeds, aiding in efficient seed dispersal and soil seedbank development. Weed species have evolved variations in seed shattering as an adaptation to changing management regimes, presenting challenges for agricultural weed management but also opportunities for innovative approaches such as harvest weed seed control.
FRONTIERS IN PLANT SCIENCE
(2021)
Article
Ecology
Trevor H. Drees, Katriona Shea
Summary: Climate change can greatly change how organisms disperse, especially for wind-dispersed plants. This study investigates the effects of climate change on the distribution of flower head heights and its impact on seed dispersal. The results show that considering all points of seed release is important for accurate simulation of dispersal.
Article
Agriculture, Multidisciplinary
Maria J. Navarro-Ramos, Casper H. A. van Leeuwen, Camilla Olsson, Johan Elmberg, Johan Mansson, Victor Martin-Velez, Adam Lovas-Kiss, Andy J. Green
Summary: This study found that waterbirds disperse a variety of plant seeds through their feces, connecting different habitats. These seeds include agricultural weeds and alien species. The findings suggest that waterbirds, particularly geese, may contribute to agricultural conflicts through seed dispersal. The proximity to suitable aquatic habitats may increase the use of agricultural habitats and the potential for seed dispersal into them.
AGRICULTURE ECOSYSTEMS & ENVIRONMENT
(2024)
Article
Green & Sustainable Science & Technology
Nanako Abe, Kohei Koyama, Azumi Okamoto, Kowa Katayama, Yura Kato, Natsuki Mimura, Shoji Okoshi, Yuki Tanaka
Summary: This study investigates the seed dispersal mechanisms of Asian plantain through trampling and walking experiments. The results indicate that seed mucilage facilitates the attachment of seeds to dispersal agents, promoting seed dispersal.
Article
Agronomy
Blessing Mhlanga, Laura Ercoli, Christian Thierfelder, Elisa Pellegrino
Summary: Weed development is a major constraint to cereal cropping systems in Southern Africa. Understanding weed community responses to different conservation agriculture components is crucial in this region.
FIELD CROPS RESEARCH
(2022)
Review
Ecology
Noelle G. Beckman, Lauren L. Sullivan
Summary: Seed dispersal is a complex process that involves the interaction of plant life history, vector movement, and the environment. It has important implications for plant population and community dynamics, including gene flow, population dynamics, range expansion, and diversity. Recent research has developed several unifying frameworks that provide a more mechanistic understanding of dispersal.
ANNUAL REVIEW OF ECOLOGY EVOLUTION AND SYSTEMATICS
(2023)
Review
Environmental Sciences
Runping Mao, Asad Shabbir, Steve Adkins
Summary: Parthenium weed has invaded 46 countries and territories since leaving its native range over two centuries ago, with the fastest spread in developing countries post-1950s; majority of international introductions due to border traffic and unchecked imports. While some countries have implemented effective management measures, there is currently insufficient international coordination and formal policies to prevent further spread.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Article
Multidisciplinary Sciences
Jesse M. Rubenstein, Philip E. Hulme, Christopher E. Buddenhagen, M. Philip Rolston, John G. Hampton
Summary: Imports of seeds for sowing are a significant pathway for introducing contaminant seeds, and effective management of this pathway is crucial for reducing future plant introductions and agricultural losses. A study on seed shipments entering New Zealand between 2014-2018 found low contamination rates overall, but significant differences in contamination levels among crop categories and species. Vegetable crop seeds had the highest contamination rates among the different crop types.
Article
Plant Sciences
Vasiliki Liava, Georgia Ntatsi, Anestis Karkanis
Summary: This study evaluated the effect of storage conditions, population, and temperature on the germination of milk thistle seeds. The results showed that all three factors significantly affected germination percentage, mean germination time, germination index, radicle length, and hypocotyl length. Cold storage mitigated the negative effect of prolonged storage, while higher temperatures reduced germination time and increased radicle and hypocotyl length. These findings are important for determining the appropriate sowing date and storage conditions, as well as designing integrated weed management systems.
Article
Horticulture
Stefano Benvenuti, Massimo Selvi, Sara Mercati, Gianluca Cardinali, Valentino Mercati, Marco Mazzoncini
Summary: Stale seedbed preparation is an effective agronomic strategy for reducing weed seed banks, with seed bank reduction being proportional to the degree of soil crumbling induced by different tillage methods. Soil surface tillage can trigger weed seed germination and reduce the seed bank.
SCIENTIA HORTICULTURAE
(2021)
Article
Agronomy
Gyula Pinke, Zsolt Giczi, Viktoria Vona, Eva Dunai, Ottilia Vamos, Istvan Kulmany, Gabor Koltai, Zoltan Varga, Renato Kalocsai, Zoltan Botta-Dukat, Balint Czucz, Akos Bede-Fazekas
Summary: This study aims to identify the main factors determining weed species composition in phacelia fields in north-western Hungary and evaluate the efficiency of tine harrow and clopyralid herbicide in reducing weed abundance and biomass. The results showed that environmental factors, non-chemical management variables, and herbicides all play a role in shaping weed species composition, while the effect of mechanical treatments might be masked by soil properties in the broad-scale survey.
Article
Agronomy
Stefano Benvenuti, Marco Mazzoncini
Summary: The ability of weed seeds to survive and emerge from different soil textures and burial depths is influenced by factors such as soil texture, seed weight, and the maximum hypocotyl elongation. The inhibitory effects on seed emergence are found to be more pronounced in clay soil compared to sandy soil. Evaluating the performance of buried seed banks in different soil textures can help improve the forecast models of emergence dynamics and lead to more rational and sustainable weed management practices.
Article
Agronomy
Elzbieta Pytlarz, Dorota Gala-Czekaj
Summary: This study aimed to evaluate the efficacy of seed meals as an environmentally friendly alternative for controlling herbicide-susceptible and -resistant wild oat. The results showed that seed meals from Sinapis alba were the most effective in inhibiting the growth of wild oat.
Article
Environmental Sciences
Blair W. Cowie, Marcus J. Byrne, Ed T. F. Witkowski
Summary: The annual herb Parthenium hysterophorus L. is a significant invasive weed in Southern Africa, causing severe losses to agriculture, livestock production, and native biodiversity. Previous studies have shown that sowing native grass species can help suppress the growth and invasion of P. hysterophorus. This research confirms that sowing native grass species, with or without clearing, may be a useful supplementary control or restoration tool for long-term management of P. hysterophorus invasions in managed savannas and rangelands in Southern Africa.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Article
Ecology
Zdenka Lososova, Irena Axmanova, Milan Chytry, Gabriele Midolo, Sylvain Abdulhak, Dirk Nikolaus Karger, Julien Renaud, Jeremie Van Es, Pascal Vittoz, Wilfried Thuiller
Summary: This study compiled a comprehensive dataset of seed dispersal distance classes and predominant dispersal modes for most European vascular plants. The seed dispersal dataset can be used in functional biogeography, dynamic vegetation modelling, and ecological studies at local to continental scales.
GLOBAL ECOLOGY AND BIOGEOGRAPHY
(2023)
Article
Agronomy
Xia Yang, Heping Han, Jingjing Cao, Yongfeng Li, Qin Yu, Stephen B. Powles
Summary: The study on susceptible and resistant lines to quinclorac revealed that the resistant plants showed lower response in terms of up-regulating quinclorac metabolism and ethylene synthesis. The resistance is likely controlled by a single major gene, involving possibly an alteration in auxin signal perception/transduction. The beta-CAS gene is unlikely to play a major role in quinclorac resistance in this specific population.
PEST MANAGEMENT SCIENCE
(2021)
Article
Agronomy
Jinyi Chen, Zhizhan Chu, Heping Han, Eric Patterson, Qin Yu, Stephen Powles
Summary: This study revealed the complexity of the alpha-tubulin gene family in individuals/populations of the cross-pollinated weedy species L. rigidum, with multiple different transcripts and transcript sequences identified. A potential mutation was found that may confer dinitroaniline resistance in L. rigidum.
PEST MANAGEMENT SCIENCE
(2021)
Article
Plant Sciences
Heping Han, Qin Yu, Roland Beffa, Susana Gonzalez, Frank Maiwald, Jian Wang, Stephen B. Powles
Summary: The rapid evolution of multiple herbicide resistance in global weed species, especially through metabolic resistance, poses a major threat to herbicide sustainability and global food production. A study found that a P450 gene in Lolium rigidum confers resistance to at least five modes of action across seven herbicide chemistries, indicating a wide cross-resistance profile to many dissimilar herbicides in transgenic plants.
Article
Plant Sciences
Pippa J. Michael, King Yin Lui, Linda L. Thomson, Ashmita Rijal Lamichhane, Sarita J. Bennett
Summary: Preconditioning temperature and duration play a role in the germination of Sclerotinia sclerotiorum sclerotia, with no response observed at 4 degrees Celsius and a minimum of 60 days of preconditioning required before significant germination occurs. The highest germination was observed at 50 degrees Celsius. Mycelial compatibility group typing showed significant diversity within and between populations, indicating local adaptation and the ability to respond to seasonal variation.
Article
Evolutionary Biology
Martin M. Vila-Aiub, Heping Han, Qin Yu, Federico Garcia, Stephen B. Powles
Summary: The study on single and double EPSPS mutations in glyphosate-resistant weed species indicated significant impact on survival and reproductive capabilities of Eleusine indica plants, with the double TIPS mutation favoring plant reproduction.
EVOLUTIONARY APPLICATIONS
(2021)
Article
Multidisciplinary Sciences
Lang Pan, Qin Yu, Junzhi Wang, Heping Han, Lingfeng Mao, Alex Nyporko, Anna Maguza, Longjiang Fan, Lianyang Bai, Stephen Powles
Summary: Glyphosate, the most widely used herbicide globally, has led to the evolution of resistance in many weed species. A study identified an ATP-binding cassette transporter, EcABCC8, that confers glyphosate resistance when expressed in transgenic rice. This transporter likely effluxes glyphosate in a plasma membrane-localized manner, reducing cellular glyphosate levels.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2021)
Review
Plant Sciences
Jinyi Chen, Qin Yu, Eric Patterson, Chad Sayer, Stephen Powles
Summary: Dinitroanilines are microtubule inhibitors that have been used as pre-emergence herbicides for weed control, showing both target-site resistance (TSR) and non-target-site resistance (NTSR) in some weedy plant species. Resistance evolution to dinitroanilines is relatively slow, and different resistance mutations may affect plant growth.
FRONTIERS IN PLANT SCIENCE
(2021)
Article
Agronomy
Sarita Jane Bennett, Ashmita Rijal Lamichhane, Linda L. Thomson, King Yin Lui, Pippa J. Michael
Summary: The study found that canola in southwest Australia does not have stable disease development conditions during the winter growing season, with low disease incidence. The Additive Main Effects and Multiplicative Interaction model showed that open-pollinated varieties were broadly adapted and stable when fungicide was applied.
Article
Plant Sciences
Chun Zhang, Qin Yu, Heping Han, Chaojie Yu, Alex Nyporko, Xingshan Tian, Hugh Beckie, Stephen Powles
Summary: This study reveals a naturally occurring mutation in glutamine synthetase that confers resistance to glufosinate in Eleusine indica. The molecular basis of target site glufosinate resistance in E. indica was established, and a mutant EiGS1-1 gene was found to confer glufosinate resistance in rice. Structural modeling showed that the mutation in EiGS1-1 affects important binding residues, suggesting parallel evolution of this resistance mutation.
JOURNAL OF EXPERIMENTAL BOTANY
(2022)
Article
Agronomy
Yanhui Wang, Heping Han, Jinyi Chen, Qin Yu, Martin Vila-Aiub, Hugh J. Beckie, Stephen B. Powles
Summary: The rare resistance mutation Arg-243-Met has a detrimental effect on fitness when plants are homozygous for this mutation, causing high plant mortality, severely diminished growth, and very poor fecundity. In contrast, plants with the Val-202-Phe mutation exhibit a fitness advantage in growth and reproduction. These contrasting effects on fitness help explain the absence of plants homozygous for the Arg-243-Met mutation and the high frequency of plants carrying the Val-202-Phe mutation in dinitroaniline-resistant populations of Lolium rigidum.
PEST MANAGEMENT SCIENCE
(2022)
Article
Agronomy
Jinyi Chen, Qin Yu, Mechelle Owen, Heping Han, Eric Patterson, Chad Sayer, Stephen Powles
Summary: This study screened 21 putative resistant field survey populations from Western Australia with trifluralin, finding that 90% of them contained individuals surviving trifluralin treatment at 480 g/ha. The study identified known alpha-tubulin resistance mutations in TUA4 and newly identified mutations in TUA3/TUA4, confirming a high incidence of resistance to trifluralin in annual ryegrass populations and highlighting the need for diverse management tactics to address both target-site and non-target-site resistance.
PEST MANAGEMENT SCIENCE
(2022)
Review
Agriculture, Multidisciplinary
Michael J. Walsh, Stephen B. Powles
Summary: The introduction of harvest weed seed control techniques in Australia has effectively reduced the population densities and herbicide resistance of annual ryegrass, while also allowing for more targeted weed control approaches. This approach has garnered international interest and research efforts are now focused on introducing it to major cropping systems worldwide.
CROP & PASTURE SCIENCE
(2022)
Article
Agronomy
Arthur Arrobas Martins Barroso, Thomas Bruno Michelon, Pedro Luis da Costa Aguiar Alves, Heping Han, Qin Yu, Stephen B. Powles, Martin M. Vila-Aiub
Summary: Goosegrass (Eleusine indica) with double Thr-102-Ile + Pro-106-Ser (TIPS) EPSPS mutations shows high resistance to glyphosate, but also incurs a substantial fitness cost. Soybean competition further increases this fitness cost, resulting in 95%, 95%, and 96% reductions in vegetative growth, seed mass, and seed number, respectively. Glyphosate treatment enhances growth in TIPS plants compared to untreated plants. Conversely, moderate glyphosate resistance mutation P106S shows decreased survival rate, vegetative growth, aboveground biomass (34%), seed mass (48%), and number (52%) when treated with glyphosate alone. However, under the combined effects of soybean competition and field-recommended glyphosate dose, both P106S and TIPS plants have significantly limited vegetative growth, aboveground biomass, seed mass, and number (≤99%).
PEST MANAGEMENT SCIENCE
(2022)
Article
Agronomy
Feng-Yan Zhou, Heping Han, Yun-Jing Han, Alex Nyporko, Qin Yu, Hugh J. J. Beckie, Stephen B. B. Powles
Summary: The expression of AKR genes (LrAKR4C10 and LrAKR1) in glyphosate-resistant populations of Lolium rigidum from Western Australia is induced by glyphosate and 2,4-D, resulting in enhanced glyphosate metabolism and moderate resistance to glyphosate.
PEST MANAGEMENT SCIENCE
(2023)
Article
Agriculture, Multidisciplinary
Huan Lu, Yingze Liu, Mengshuo Li, Heping Han, Fengyan Zhou, Alex Nyporko, Qin Yu, Sheng Qiang, Stephen Powles
Summary: A wild radish population has developed cross-resistance to HPPD-inhibiting herbicides without previous exposure, thanks to enhanced metabolism. The study identified three highly expressed genes in resistant plants, and overexpression of these genes provided resistance against specific herbicides. The findings suggest that overexpression of multiple herbicide-metabolizing genes contributes to herbicide resistance in the wild radish population.
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
(2023)