Peach trees can recruit their own nitrogen-fixing bacteria
Li Y, Guo J, Wei H, Liu G, Gao S
Plant Signaling
If you grow fruit trees, this points to a future where smarter, lower fertilizer inputs work with the tree's own root chemistry instead of just dumping more nitrogen into the soil.
Peach trees given a precisely controlled, lower dose of nitrogen fertilizer respond by releasing a natural compound called arbutin from their roots. That compound acts like a dinner bell for a specific soil bacterium that pulls nitrogen straight out of the air and hands it to the tree, so the tree ends up using the nitrogen it does get much more efficiently.
Key Findings
Bag-controlled low-nitrogen (BCLN) fertilization increased rhizosphere microbial diversity, N-fixing microbe abundance, and nitrogenase activity in peach root zones.
Peach roots under BCLN conditions secrete arbutin, which selectively enriches the nitrogen-fixing bacterium Pseudomonas strain DT33X.
Arbutin boosted DT33X growth, root colonization, and nitrogen-fixation capacity, shown by higher nifH gene copy numbers in soil, improving overall plant nitrogen-use efficiency.
chevron_right Technical Summary
Scientists found that when peach trees are fed a controlled, low dose of nitrogen fertilizer through a bagging technique, their roots release a natural sugar compound called arbutin that recruits helpful soil bacteria to fix nitrogen from the air, letting the trees grow well with less fertilizer.
Abstract Preview
Original paper
Bag-controlled low-nitrogen fertilization induces root arbutin secretion to enrich rhizosphere Pseudomonas and enhance nitrogen fixation in peach.
Interactions between plant roots and nitrogen (N)-fixing microorganisms in the rhizosphere are crucial for plant growth and development. However, the contribution of rhizosphere microbial N fixatio...
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The peach is a deciduous tree that bears edible juicy fruits with various characteristics. Most are simply called peaches, while the glossy-skinned, non-fuzzy varieties are called nectarines. Though from the same species, they are regarded commercially as different fruits.