%0 Journal Article %T Effects of Two Fruit-Fattening Biostimulants on Yield and Fruit Quality of Greenhouse-Grown Saladette Tomato (Solanum lycopersicum L.) %A Vicente De Jesú %A s Alvarez-Mares %A Heidi Melania Medina-Montenegro %A Jordi Gerardo Ló %A pez-Velá %A zquez %A Ricardo Guillermo Ló %A pez-Españ %A a %A Pedro Alberto Rojas-Rojas %A Adrian Abimael Piñ %A a-Soto %A Guadalupe Humberto Gurrola-Ló %A pez %J Open Access Library Journal %V 13 %N 8 %P 1-14 %@ 2333-9721 %D 2026 %I Open Access Library %R 10.4236/oalib.1115505 %X This study aimed to evaluate the effect of two fruit-fattening biostimulant formulations on tomato (Solanum lycopersicum L.) growth, fruit quality, and yield under greenhouse conditions. The experiment was conducted in a gable-type greenhouse at the Technological University of Culiacán, Sinaloa, Mexico. Two fruit-fattening biostimulants (A and B) were evaluated together with an untreated control. The evaluated variables included leaf greenness (SPAD index), fruit firmness (PSI), total soluble solids (˚Brix), fresh fruit weight, and yield per hectare. The results showed that biostimulant application significantly affected fruit firmness, total soluble solids, fresh fruit weight, and yield. Biostimulant A produced the highest fresh fruit weight (221.6 g∙fruit−1) and yield (470.8 t∙ha−1), followed by Biostimulant B (180.4 g∙fruit−1 and 367.25 t∙ha−1), whereas the control treatment showed the lowest values (139.6 g∙fruit−1 and 320.8 t∙ha−1). No significant differences were observed among treatments for the SPAD index, whereas total soluble solids were significantly increased by Biostimulant A (5.85 ˚Brix) compared with Biostimulant B (4.75 ˚Brix) and the control (4.30 ˚Brix). Fruits from plants treated with Biostimulant A also exhibited the highest firmness (8.48 PSI). Biostimulant A improved tomato yield and enhanced important fruit quality attributes. These findings indicate that Biostimulant A represents a promising agronomic strategy for improving tomato productivity under protected cultivation. %K Solanum lycopersicum %K Biostimulant %K Fruit Quality %K Yield %K Protected Cultivation %U http://www.scirp.org/journal/PaperInformation.aspx?PaperID=153225