Storage or transportation temperature is very important for preserving the quality of fruit.However,low temperature in sensitive fruit such as peach can induce loss of quality.Fruit exposed to a specific range of temp...Storage or transportation temperature is very important for preserving the quality of fruit.However,low temperature in sensitive fruit such as peach can induce loss of quality.Fruit exposed to a specific range of temperatures and for a longer period can show chilling injury(CI)symptoms.The susceptibility to CI at low temperature varies among cultivars and genetic backgrounds.Along with agronomic management,appropriate postharvest management can limit quality losses.The importance of correct temperature management during postharvest handling has been widely demonstrated.Nowadays,due to long-distance markets and complex logistics that require multiple actors,the management of storage/transportation conditions is crucial for the quality of products reaching the consumer.Peach fruit exposed to low temperatures activate a suite of physiological,metabolomic,and molecular changes that attempt to counteract the negative effects of chilling stress.In this review an overview of the factors involved,and plant responses is presented and critically discussed.Physiological disorders associated with CI generally only appear after the storage/transportation,hence early detection methods are needed to monitor quality and detect internal changes which will lead to CI development.CI detection tools are assessed:they need to be easy to use,and preferably non-destructive to avoid loss of products.展开更多
Ornamental plants are used to decorate urban and peri-urban areas,and during their cultivation or utilisation,they can be exposed to abiotic stress.Salinity is an abiotic stress factor that limits plant growth and red...Ornamental plants are used to decorate urban and peri-urban areas,and during their cultivation or utilisation,they can be exposed to abiotic stress.Salinity is an abiotic stress factor that limits plant growth and reduces the ornamental value of sensitive species.In this study,transcriptomic analysis was conducted to identify genes associated with tolerance or sensitivity to salinity in two hibiscus(Hibiscus rosa-sinensis L.)cultivars,‘Porto’and‘Sunny wind’.The physiological and biochemical parameters of plants exposed to 50,100,or 200 mM NaCl and water(control)were monitored.Salinity treatments were applied for six weeks.After four weeks,differences between cultivars were clearly evident and‘Porto’was more tolerant than‘Sunny wind’.The tolerant cultivar showed lower electrolyte leakage and ABA concentrations,and higher proline content in the leaves.Accumulation of Na in different organs was lower in the flower organs of‘Porto’.At the molecular level,several differential expressed genes were observed between the cultivars and flower organs.Among the highly expressed DEGs,coat protein,alcohol dehydrogenase,and AP2/EREBP transcription factor ERF-1.Among the downregulated genes,GH3 and NCED were the most interesting.The differential expression of these genes may explain the salt stress tolerance of‘Porto’.展开更多
基金Open access funding provided by Shanghai Jiao Tong Universitysupported by Fondazione con il Sud,call Brain2South,as part of the FRUITY project(2015-0245).
文摘Storage or transportation temperature is very important for preserving the quality of fruit.However,low temperature in sensitive fruit such as peach can induce loss of quality.Fruit exposed to a specific range of temperatures and for a longer period can show chilling injury(CI)symptoms.The susceptibility to CI at low temperature varies among cultivars and genetic backgrounds.Along with agronomic management,appropriate postharvest management can limit quality losses.The importance of correct temperature management during postharvest handling has been widely demonstrated.Nowadays,due to long-distance markets and complex logistics that require multiple actors,the management of storage/transportation conditions is crucial for the quality of products reaching the consumer.Peach fruit exposed to low temperatures activate a suite of physiological,metabolomic,and molecular changes that attempt to counteract the negative effects of chilling stress.In this review an overview of the factors involved,and plant responses is presented and critically discussed.Physiological disorders associated with CI generally only appear after the storage/transportation,hence early detection methods are needed to monitor quality and detect internal changes which will lead to CI development.CI detection tools are assessed:they need to be easy to use,and preferably non-destructive to avoid loss of products.
基金funded by MIUR with PRIN 2006-2007“Physiological and molecular aspects of hormonal regulation during the post-production quality of flowering potted plants”.
文摘Ornamental plants are used to decorate urban and peri-urban areas,and during their cultivation or utilisation,they can be exposed to abiotic stress.Salinity is an abiotic stress factor that limits plant growth and reduces the ornamental value of sensitive species.In this study,transcriptomic analysis was conducted to identify genes associated with tolerance or sensitivity to salinity in two hibiscus(Hibiscus rosa-sinensis L.)cultivars,‘Porto’and‘Sunny wind’.The physiological and biochemical parameters of plants exposed to 50,100,or 200 mM NaCl and water(control)were monitored.Salinity treatments were applied for six weeks.After four weeks,differences between cultivars were clearly evident and‘Porto’was more tolerant than‘Sunny wind’.The tolerant cultivar showed lower electrolyte leakage and ABA concentrations,and higher proline content in the leaves.Accumulation of Na in different organs was lower in the flower organs of‘Porto’.At the molecular level,several differential expressed genes were observed between the cultivars and flower organs.Among the highly expressed DEGs,coat protein,alcohol dehydrogenase,and AP2/EREBP transcription factor ERF-1.Among the downregulated genes,GH3 and NCED were the most interesting.The differential expression of these genes may explain the salt stress tolerance of‘Porto’.
