Tomato gene research promises higher yields and drought resilience

Researchers in Argentina identified the protein SlBBX20 as a biological switch that lets tomato plants detect shade from neighboring plants, adjust growth, and maintain fruit production in high‑density fields. The discovery, published in Plant Physiology and Biochemistry, shows that SlBBX20 influences plant height, hormone activity, photosynthesis and ultimately yield, offering a molecular target for breeding more light‑efficient, high‑yield tomato varieties.

In parallel, scientists in China demonstrated that over‑expressing the tomato gene SlbHLH70 improves plant survival and recovery after drought in controlled experiments. The gene, a transcription factor, raises abscisic‑acid levels and promotes longer, heavier roots, helping plants cope with water shortage. Plants lacking a functional SlbHLH70 performed poorly under the same conditions. Both studies suggest new genetic targets for developing tomato cultivars that are more productive under shade and more tolerant of dry conditions.