Ethylene is a potential sprout inhibitor in sweetpotato

This study investigated the effects of ethylene and 1-methylcyclopropene (1-MCP) on sweetpotato storage root quality. Sweetpotato roots of cultivar ?Owairaka Red? were cured at 30?C and 90% relative humidity (RH) for 4 days. Subsamples of roots were treated with 1-MCP (1ppm) for 24 hours. Thereafter, the treated or untreated roots were stored at 25?C and 85% RH in continuous ethylene (10 ppm) or air for 4 weeks. Ethylene treatment with or without 1-MCP inhibited sprout growth, whereas 1-MCP treatment alone was not different from the control (neither ethylene nor 1-MCP) as sprouting started 1 week after storage in both treatments. Additionally, ethylene treatment increased root respiration rates and weight loss, whilst also leading to formation of callus on root stem ends. Contrary to expectations, ethylene induced responses were not stopped by 1-MCP. The flesh colour of cooked sweetpotatoes was darker in ethylene treated roots than the control or 1-MCP alone. These results suggest that ethylene is a potential sprout inhibitor in sweetpotato. It also appears that a 24 hour exposure to 1-MCP at 1 ppm is not sufficient to stop ethylene-induced responses in sweetpotato. Further work is required to evaluate a wider range of 1-MCP concentrations and also establish the consumer acceptability of ethylene treated sweetpotato. Original title, list of authors and sourcesEFFECTS OF ETHYLENE AND 1-METHYLCYCLOPROPENE ON SWEETPOTATO STORAGE ROOT QUALITYPankomera, P1, Lewthwaite, SL2, Roskruge, NR1 ,Heyes, JA1P.Pankomera@massey.ac.nz1Massey University, Palmerston North, New Zealand2Plant and Food Research, Pukekohe, New Zealand IHC 2014, International Horticulture Congress, 17-22 August 2014, Brisbane, http://www.ihc2014.org/ The picture is by gastronomiaycia.com Key words Poscosecha??????? postcosecha????? postharvest?????? na-oes? ?????????????? ?????????????????????? post-r?colte????? ???? ?? ??????????????????????????????????????? na-oogst???????????? post-raccolta???? Obr?bka po?????? p?s-colheita????? ???????????????????????? hasat sonras????? ??????????????? Ernte???? ????????????????????????? ???? ?????????????????? postcollita?????????? poskliz?ov頠???? ?????? ????????????????? ??????????????? nakon branja???? pozberov頠?????????????????????? obdelovanje zemlje po??????????????? post-colleita????? ??????????????? pascapanen??????????????? ?il?onn postharvest??????? ????????????? p?c ra?as???????????? derliaus apdirbimas polepas tuai??????????? ??????????? post-recoltare???????????? ?????? ?????? ???????????????????????? ?????????????????????? ??????????????????????????? sau thu ho?ch??????????????? ?????????????????????????????? zangemva kwenkathi yokuvuna Boniato???????????????????????????? sweet potato??? patat???? ???????????????????????? ?????? dol?a terpomo? patate douce??? ????????????? ?????????????????? zoete aardappel????????????? patata dolce????? batat??????????????? batata doce?????? ??????? ?????????????? tatl? patates?????? ??????????????????? S??kartoffel????????????????????? Etileno? ??????????????? ethylene???????????? etileen?????????????????? ?????????????????????? ?thyl?ne???????????? ??????????????????? ??????????????????? ethyleen??????????????? etilene???????????????????????????????? ??????etilen??? ??????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????? ?????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????? ??????????????????????????????????????????????????????????????