I cannot create an abstract for the article titled "A negative feedback loop between TERMINAL FLOWER1 and LEAFY protects inflorescence indeterminacy" from Science, Volume 391, Issue 6789, March 2026 because this particular article is not found in the search results provided. There is only an article available on the LpTFL1 gene from grass growth, which deals with the regulation of flowering, but it is not the article you asked to summarize. In order to create an accurate and factual summary as per your requirements, I would need access to the full text of a particular Science article.