کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6406626 1628800 2016 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Short communicationAlternatives to phosphonates for fruit colouration
ترجمه فارسی عنوان
ارتباط کوتاه آلترناتیوهای فسفونات برای رنگ آمیزی میوه
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک دانش باغداری
چکیده انگلیسی


- Red fruit colouration is a trade and consumer requirement.
- Phosphonate foliar fertilisers enhance fruit colouration.
- Phosphonates now classified as pesticides→MRLs.
- Study examined phosphonate-free alternatives (chemicals and mulch).
- Reflective mulches more effective, chemical (Sunred™) more economic.

Red colouration is a prime consideration for the consumer when purchasing any fruit, whether tomato, pepper, strawberry or apple. Phosphonates, previously used to enhance fruit colouration e.g. in apple, have now been classified by the EU as plant protection agents, which implies scrutiny of treated fruit to residues.Therefore, two phosphonate-free, potentially colour enhancing agents, i.e. WuxalP45 and Sunred, were examined on apple cv.'Braeburn' at Klein-Altendorf as to their effect on fruit quality i.e. colour, starch degradation (ripe-ness), sugar (taste) and firmness (storability) in comparison with reflective mulches, spread in the alleyways 5-6 weeks before harvest. In 2014, a year with good fruit colouration, WuxalP45 (2 × 5 L/ha) showed no effect on fruit colourat-ion, firmness or class I or fruit size distribution relative to the control. Sunred, a new bio-stimulant of PAL activity, containing phenyl-alanine, monosaccharides, oxylipins, and methionine as ethylene precursor improved colouration by ca. 2% when expressed as fruit with >50% colouration and 12.2% of fruit >75% red colouration without affecting fruit firmness but accelerated ripening.Both inorganic mulches increased light reflection to the fruit from 1 to 2 to 45-55 μmol PAR m−2 s−1, which improved colouration particularly of the down-facing side of the apple fruit to values of a = 25.7 (Daybright) and 34.1 (Extenday) relative to green peel of the control fruit (grass; a = 1.0) with a concomitant reduction from hue = 87 (green) in the control to hue = 46 with Daybright and 36 (red) with Extenday. Similarly, both reflective mulches increased the portion of fruit with >50% red colouration by 44% (Daybright) and 55% (Extenday) without affecting fruit quality. The results indicate utilisation of reflective materials as most efficient option in the future, followed by Sunred, when phosphonates are no longer available for fruit colouration; this work appears to be the first work in search for alternatives to phosphonates for fruit colouration in horticulture.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Scientia Horticulturae - Volume 198, 26 January 2016, Pages 434-437
نویسندگان
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