Molecular basis of delayed leaf senescence induced by short-term treatment with low phosphate in rice.
Martín-Cardoso H, Bundó M, Garcia-Molina A, Segundo BS
Crop Improvement
The rice in your grocery store could be grown with less phosphorus fertilizer — and stay productive longer — if farmers apply this discovery to time and limit fertilizer applications more precisely.
Scientists found that giving rice plants less phosphorus (a key ingredient in fertilizers) actually slows down leaf aging and keeps leaves healthier longer, while too much phosphorus has the opposite effect. Tiny molecular messengers inside the plant act like volume knobs controlling how fast leaves age, and those knobs are tuned by how much phosphorus is available. By tweaking these molecular messengers with gene editing, researchers could speed up or slow down leaf aging on demand, which opens the door to rice varieties that stay green and productive longer in the field.
Key Findings
Low phosphate treatment increased photosynthetic pigment content and antioxidant enzyme activity in rice seedlings, while reducing membrane damage — signs of healthier, younger leaves
CRISPR/Cas9 editing of the MIR827 gene lowered cellular phosphorus levels and measurably delayed leaf senescence, confirming a direct causal link
Overexpression of microRNAs miR399 and miR827 caused phosphorus to accumulate in cells and accelerated leaf senescence, demonstrating bidirectional control of the aging process
chevron_right Technical Summary
Rice plants exposed to low phosphorus levels show delayed leaf aging, while excess phosphorus accelerates it. Molecular switches called microRNAs (miR399 and miR827) regulate this process by controlling phosphorus balance inside plant cells, pointing to new strategies for smarter fertilizer use.
Abstract Preview
Leaf senescence is a programmed plant developmental process that can also be regulated by environmental factors, like nutrient availability. Although phosphorus is an essential element determining ...
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