Melon lncRNA Modification for Delayed Ripening and Shelf Life
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Solution Overview
Problem
Climacteric melon types have a short shelf life due to rapid fruit softening and ethylene-induced ripening after harvest, leading to commercial losses and consumer preference for less aromatic non-climacteric melons.
Innovation Solution
Introduction of a modified long non-coding RNA (lncRNA) gene with a G1571A mutation in the Cucumis melo plant, which delays ethylene production and fruit softening, resulting in improved shelf life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If climacteric melon types are used to provide aromatic and fruity flavors, then flavor quality is improved, but shelf life deteriorates due to rapid fruit softening and ethylene-induced ripening after harvest
Solution Approach 1:
The invention modifies the expression level of the NOR1 gene through genetic engineering, changing the physiological parameter of ethylene sensitivity in climacteric melons. This parameter change allows the melons to delay the ethylene burst and associated ripening processes, thereby extending shelf life while preserving the aromatic flavor characteristics that define climacteric melon quality
2Ease of manufacture
If climacteric melon types are used to provide aromatic and fruity flavors, then consumer preference is improved, but commercial losses increase due to limited storability and shelf life
Solution Approach 1:
By genetically modifying the NOR1 gene expression, the invention changes the temporal parameter of ripening progression. This allows climacteric melons to maintain their consumer-preferred aromatic qualities while delaying the softening and deterioration processes that lead to commercial losses, thereby reducing waste during storage and transportation
3Duration of action of stationary object
If non-climacteric melon types are used to extend shelf life, then storability is improved, but flavor quality deteriorates due to reduced aromatic and fruity characteristics
Solution Approach 1:
The invention applies parameter change by modifying the ethylene response threshold in climacteric melons through NOR1 gene manipulation. This creates an intermediate state where melons maintain the genetic potential for aromatic flavor development but delay the expression of ripening symptoms, effectively decoupling flavor maturation from physical softening and extending the window of optimal quality
Data Source
AI summary
The present invention relates to Cucumis melo plant having a modified lncRNA gene according to SEQ ID NO: 1, or according to a sequence having at least 50% sequence identity to SEQ ID NO: 1, having a modification, wherein the modification comprises an insertion, a deletion or a substitution of at least one nucleotide. The modified lncRNA gene has a changed function, a reduced function, or is non-functional. The modification is suitably in the second exon and can be a G1571A mutation at position 1571 in SEQ ID NO: 1. Presence of the modified lncRNA gene confers improved shelf life of the fruits, when compared to fruits of an isogenic melon plant lacking the modified lncRNA gene. The improved shelf life of the fruits is characterized by a prolonged firmness of the fruit flesh, and/or by a delay of the ethylene peak during ripening of the fruits.