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Genomic inferences of domestication events are corroborated by written records in Brassica rapa ($)

There are many subspecies of Brassica rapa [including turnip (subsp. rapa) pak choi (subsp. chinensis) and Chinese cabbage (subsp. pekinensis)] but the relationships between the subspecies has remained uncertain. Qi et al. sequenced 143 accessions, including some subspecies for the first time. They then used genomics approaches to develop a phylogeny. They corroborate their molecular […]

Long-term trends in the intensity and relative toxicity of herbicide use

“Weeds are a fact of life for farmers around the world,” writes Kniss in this analysis of herbicide-use trends. He stresses the limitation of reports that measure only the weight of herbicides used, as there is tremendous variation in the toxicity of different herbicides. He shows that although herbicide use intensity has risen,  for many […]

Rapid breeding of parthenocarpic tomato plants using CRISPR/Cas9

Most fruits form after pollination, making their production vulnerable to pollinator presence. Parthenocarpy is the development of fruit that occurs in the absence of pollination. Genes that enable parthenocarpy have been identified, including a tomato gene involved in auxin responses SlIAA9. Ueta et al. used CRISPR/Cas9 to efficiently engineer parthenocarpy into two commercial tomato varieties. […]

Arabidopsis leucine-rich repeat receptor-like kinase NILR1 is required for induction of innate immunity to parasitic nematodes

Plant parasitic nematodes, including root-knot nematodes and cyst nematodes, cause extensive damage and loss to many crops. Nematodes elicit a pathogen-triggered immunity (PTI) defense response, but the molecular basis for this response has not been previously characterized. Mendy et al. identified a leucine-rich repeat receptor-like kinase NILR1 that recognizes an as yet unknown nematode protein […]

Regulation of strigolactone biosynthesis by gibberellin signaling

In a screen for chemicals that regulate strigolactone (SL) levels in rice, Ito et al. found that gibberellins suppress SL biosynthesis. This effect depends on the gibberellin signaling module, and involve a decrease in expression level of SL-biosynthetic genes. Furthermore, GA treated rice exuded less SL into the soil, and Striga seed germination frequency was […]

Mutation in sorghum LOW GERMINATION STIMULANT 1 alters strigolactones and causes Striga resistance

Strigolactones are both hormones that control shoot architecture and signals that promote interactions with arbuscular mycorrhizal fungi and promote germination of detrimental parasitic weeds such as Striga asiatica and Striga hermonthica. Gobena et al. mapped and cloned a sorghum gene, LOW GERMINATION STIMULANT 1 (LGS1), previously identified as conferring less stimulation of germination in Striga. […]

306 Articles | Page 1 of 51