{"id":13560,"date":"2017-05-24T11:11:28","date_gmt":"2017-05-24T18:11:28","guid":{"rendered":"https:\/\/vermont.salk.edu\/?post_type=disclosure&p=13560"},"modified":"2024-01-30T15:10:14","modified_gmt":"2024-01-30T23:10:14","slug":"helping-plants-pump-iron","status":"publish","type":"disclosure","link":"https:\/\/www.salk.edu\/es\/news-release\/helping-plants-pump-iron\/","title":{"rendered":"Ayudando a las plantas a bombear hierro"},"content":{"rendered":"
\"Seedlings
Seedlings (bottom) and roots (top) of Arabidopsis thaliana<\/em> plants reveal that one variant of the\u00a0FRO2<\/em> gene (right) is better for growth in low-iron conditions than the other FRO2<\/em> variant (left).<\/p>\n

Haga clic aqu\u00ed<\/a> para obtener una imagen en alta resoluci\u00f3n. <\/p>\n

Cr\u00e9dito: Instituto Salk<\/figcaption><\/figure>\n

LA JOLLA\u2014Just like people, plants need iron to grow and stay healthy. But some plants are better at getting this essential nutrient from the soil than others. Now, a study led by a researcher at the Salk Institute has found that variants of a single gene can largely determine a plant\u2019s ability to thrive in environments where iron is scarce.<\/p>\n

The work, which appears in Nature Communications<\/em><\/a> on May 24, 2017, could lead to improved crop yields for farmers and richer dietary sources of iron for animals and humans.<\/p>\n

\u201cAlmost all life on Earth is based on plants\u2014animals eat plants and we eat animals or plants,\u201d says Wolfgang Busch<\/a>, an associate professor in Salk\u2019s Plant Molecular and Cellular Biology Laboratory and senior author of the new paper. \u201cIt’s very important for us to understand how plants solve the problem of getting iron because even though it\u2019s generally abundant on Earth, the form that plants can use is actually scarce.\u201d<\/p>\n

The current work, led by Busch and including researchers from Austria\u2019s Gregor Mendel Institute of Molecular Plant Biology<\/a> (where Busch was formerly based) focused on the well-studied weed Arabidopsis thaliana<\/em>, a relative of cabbage and mustard. They obtained Arabidopsis<\/em> seeds from strains that naturally occur all over Sweden, which has a variety of soils including some that are very low in iron. The team was particularly interested in strains that have adapted to low-iron soils and can grow a long root (a marker of health) even in those poor conditions.<\/p>\n

The researchers grew the seeds in low-iron conditions, measuring their root growth along the way. They then employed a cutting-edge method called a Genome Wide Association Study (GWAS), which associates genes with a trait of interest\u2014in this case root length. A gene called FRO2 <\/em>stood out as having a strong connection to root length. Different versions of the FRO2 <\/em>gene (\u201cvariants\u201d) fell into two groups, those that were associated with a short root and those that were associated with a long root.<\/p>\n

\"From
From left: Santosh Satbhai and Wolfgang Busch<\/p>\n

Haga clic aqu\u00ed<\/a> para obtener una imagen en alta resoluci\u00f3n. <\/p>\n

Cr\u00e9dito: Instituto Salk<\/figcaption><\/figure>\n

To find out whether variants of FRO2 <\/em>were actually causing the difference (rather than merely being associated with it), the team grew seeds whose FRO2 <\/em>gene had been deactivated. All plants in which the FRO2<\/em> gene had been deactivated now had stunted roots.\u00a0The team then put\u00a0either\u00a0one variant or the other variant of the gene back in and again grew the plants in low-iron conditions. Variants for long roots grew better than variants for short roots. Together, the experiments showed that, indeed, genetic variants that confer higher activity of the FRO2 <\/em>gene can largely be responsible for root growth and plant health in low-iron conditions. (Under normal conditions, FRO2<\/em> is not activated.)<\/p>\n

\u201cWe thought by using a geographically restricted set of Arabidopsis thaliana<\/em> strains, we could address local plant adaptations with respect to root growth under iron deficiency\u2014and we did,\u201d says Santosh Satbhai, a Salk research associate and first author of the paper. \u201cWe hope the agricultural community can benefit from this information.\u201d<\/p>\n

El FRO2<\/em> gene is common to all plants, so boosting its expression in food crops or finding variants that thrive in poor soils could be important for increasing crop yields in the face of population growth and global warming\u2019s threats to arable land.<\/p>\n

\u201cAt least two billion people worldwide currently suffer from iron malnutrition. Anything we can do to improve the iron content of plants will help a lot of people,\u201d adds Busch.<\/p>\n

Other authors included Claudia Setzer, Florentina Freynschlag, Radka Slovak and Envel Kerdaffrec of the Gregor Mendel Institute<\/a>.<\/p>\n

The work was funded by the Austrian Academy of Sciences<\/a> through the Gregor Mendel Institute (GMI) and an Austrian Science Fund<\/a> (FWF) stand-alone project (P27163-B22).<\/p>","protected":false},"featured_media":13561,"template":"","faculty":[300],"disease-research":[450,125,451,452],"class_list":["post-13560","disclosure","type-disclosure","status-publish","has-post-thumbnail","hentry","faculty-wolfgang-busch","disease-research-climate-change","disease-research-plant-biology","disease-research-plant-genomics","disease-research-plant-physiology"],"acf":[],"yoast_head":"\nHelping plants pump iron - Salk Institute for Biological Studies<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.salk.edu\/es\/news-release\/helping-plants-pump-iron\/\" \/>\n<meta property=\"og:locale\" content=\"es_MX\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Helping plants pump iron - 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