نتایج جستجو برای: elymus

تعداد نتایج: 464  

Journal: :Crop Protection 2023

Elymus repens is a problematic perennial weed in annual crops, grasslands and leys. Rhizome fragmentation by vertical disking can potentially reduce E. abundance with minimal tillage, but data are lacking on its efficiency forage production. In two-year study (2017–2018, 2018–2019) conducted two grass-clover leys that were mostly weed-free except for large populations, this examined effects yie...

2015
Juanjuan Fu Xitong Chu Yongfang Sun Yanjun Miao Yuefei Xu Tianming Hu Weijun Zhou

Nitric oxide (NO) and 5-aminolevulinic acid (ALA) are both extremely important signalling molecules employed by plants to control many aspects of physiology. In the present study, the role of NO in ALA-induced antioxidant defense in leaves of two sources of Elymus nutans Griseb. (Damxung, DX and Zhengdao, ZD) was investigated. Chilling stress enhanced electrolyte leakage, accumulation of malond...

2013
Stephen L. Young Jacob N. Barney Guy B. Kyser Tracy S. Jones Joseph M. DiTomaso

Plant community functional composition can be manipulated in restored ecosystems to reduce the establishment potential of invading species. This study was designed to compare invasion resistance among communities with species functionally similar or dissimilar to yellow starthistle (Centaurea solstitialis), a late-season annual. A field experiment was conducted in the Central Valley of Californ...

Journal: :Molecular phylogenetics and evolution 2008
Roberta J Mason-Gamer

The phylogenetic position of hexaploid Elymus repens within the tribe Triticeae (Poaceae) was examined using cloned sequences from the low-copy nuclear genes encoding phosphoenolpyruvate carboxylase (pepC) and beta-amylase. A previous analysis of E. repens using data from the nuclear granule-bound starch synthase I (GBSSI) gene had yielded five phylogenetically distinct gene copies, two more th...

2017
Iryna Dronova Erica N. Spotswood Katharine N. Suding

Understanding spatial distributions of invasive plant species at early infestation stages is critical for assessing the dynamics and underlying factors of invasions. Recent progress in very high resolution remote sensing is facilitating this task by providing high spatial detail over whole-site extents that are prohibitive to comprehensive ground surveys. This study assessed the opportunities a...

2013
Mark Thorne Landon Rhodes John Cardina

We examined suitability of arbuscular mycorrhizal fungi (AMF) associated with cool-season nonnative forages on reclaimed surface-mined land in southeast Ohio for establishment of native warm-season grasses. The goal of establishing these grasses is to diversify a post-reclamation landscape that is incapable of supporting native forest species. A 16-week glasshouse study compared AMF from a 30-y...

Journal: :Current Biology 2005
Mohan Balasubramanian

Mohan Balasubramanian is deputy director and senior principal investigator at the Temasek Life Sciences Laboratory, Singapore. He is also a member of the Department of Biological Sciences at the National University of Singapore. He grew up in India and did a doctorate at the University of Saskatchewan in Canada, starting work on cytokinesis in Schizosaccharomyces pombe in the laboratory of Sean...

2013
Stephen L. Young Guy B. Kyser Jacob N. Barney Victor P. Claassen Joseph M. DiTomaso

To resist establishment by an invasive plant, a community may require one or more species functionally similar to the invader in their resource acquisition pattern. In this study, communities consisting of native winter annual forbs, non-native annual grasses, native perennials, or a combination of the two native communities were established with and without Centaurea solstitialis to determine ...

2017
Scott R. Abella

Seed availability and leaf litter limit plant establishment in some ecosystems. To evaluate the hypothesis that these factors limit understory plant recruitment in Pinus ponderosa forests, I conducted a seeding and litter removal experiment at six thinned sites in the Fort Valley Experimental Forest, northern Arizona. Experimental seeding of four native species (Penstemon virgatus, Erigeron for...

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