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Necked strawberries are especially susceptible to cracking
Grecia Hurtado1, Moritz Knoche1
1Institute for Horticultural Production Systems, Leibniz University Hannover, Hannover, Germany.
Peerj
|May 16, 2023
Summary
Strawberry fruit cracking, a major commercial issue, is caused by excessive growth strains, particularly in larger, necked fruits. Surface water uptake exacerbates this cracking, impacting fruit quality.
Area of Science:
- Horticulture
- Plant Physiology
- Agricultural Science
Background:
- Fruit cracking in strawberries (Fragaria × ananassa Duch.) is a significant commercial problem, reducing yield and quality.
- Understanding the physiological basis of cracking is crucial for developing mitigation strategies.
Purpose of the Study:
- To elucidate the physiological mechanisms underlying fruit cracking in strawberries.
- To identify key factors influencing the susceptibility of strawberries to cracking.
Main Methods:
- Comparative analysis of 'necked' versus normal-shaped strawberries.
- Examination of fruit morphology, cuticle thickness, vascular bundle orientation, and epidermal cell structure.
- Assessment of cuticular microcracking and response to artificial incisions and water uptake.
Main Results:
- 'Necked' strawberries, larger fruits, and those with thicker cuticles in the neck region exhibit higher cracking susceptibility.
- Cracks predominantly occur in the seedless neck, with specific latitudinal and longitudinal orientations.
- Water uptake significantly induced macrocracks, especially in 'necked' fruit.
Conclusions:
- Strawberry fruit cracking is primarily driven by excessive growth strains, amplified by water absorption.
- Fruit shape, size, and anatomical features like cuticle thickness play critical roles in cracking susceptibility.
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