Progressive Decline in Xylem Inflow into Developing Plums

Recent evidence suggests xylem functionality may decline in developing European plums. Loss of xylem function may have negative consequences for fruit quality. The aim of this study was to establish and localize the loss of xylem functionality, both spatially and temporally using detached fruit. Fru...

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Autores principales:	Bishnu P. Khanal, Indu Acharya, Moritz Knoche
Formato:	article
Lenguaje:	EN
Publicado:	American Society for Horticultural Science (ASHS) 2021
Materias:	european plum prunus ×domestica xylem water inflow transpiration osmotic pull Plant culture SB1-1110
Acceso en línea:	https://doi.org/10.21273/HORTSCI16012-21 https://doaj.org/article/512b90bafb51473bb610d5fd1a9cd900
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spelling	oai:doaj.org-article:512b90bafb51473bb610d5fd1a9cd9002021-11-08T18:42:02ZProgressive Decline in Xylem Inflow into Developing Plumshttps://doi.org/10.21273/HORTSCI16012-212327-9834https://doaj.org/article/512b90bafb51473bb610d5fd1a9cd9002021-09-01T00:00:00Zhttps://journals.ashs.org/hortsci/view/journals/hortsci/56/10/article-p1263.xmlhttps://doaj.org/toc/2327-9834Recent evidence suggests xylem functionality may decline in developing European plums. Loss of xylem function may have negative consequences for fruit quality. The aim of this study was to establish and localize the loss of xylem functionality, both spatially and temporally using detached fruit. Fruit were detached from the tree under water and fed through a capillary mounted on the cut end of the pedicel. The rate of water movement through the capillary was recorded. Fruit were held above dry silica gel [≈0% relative humidity (RH)] or above water (≈100% RH) to maximize or minimize transpiration, respectively. Water inflow rate depended on developmental stage. It increased from stage I to a maximum at early stage III and then decreased until maturity. Feeding acid fuchsin to developing fruit revealed a progressive decline in dye distribution. The decline progressed basipetally, from the stylar end toward the stem end. At the mature stage III, only the pedicel/fruit junction was stained. The same pattern was observed in four further plum cultivars at the mature stage III. The inflow into early stage III fruit decreased as the RH increased. In contrast, the inflow was less dependent of RH at the mature stage III. Abrading the fruit skin cuticle had no effect on water inflow during early and mature stage III but did markedly increase fruit transpiration rate. Decreasing the osmotic potential (more concentrated) of the feeding solution decreased the water inflow. Our results indicate a progressive loss of xylem functionality in European plum. Transpiration and osmotic pull are the main drivers of this xylem inflow.Bishnu P. KhanalIndu AcharyaMoritz KnocheAmerican Society for Horticultural Science (ASHS)articleeuropean plumprunus ×domesticaxylemwater inflowtranspirationosmotic pullPlant cultureSB1-1110ENHortScience, Vol 56, Iss 10, Pp 1263-1268 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	european plum prunus ×domestica xylem water inflow transpiration osmotic pull Plant culture SB1-1110
spellingShingle	european plum prunus ×domestica xylem water inflow transpiration osmotic pull Plant culture SB1-1110 Bishnu P. Khanal Indu Acharya Moritz Knoche Progressive Decline in Xylem Inflow into Developing Plums
description	Recent evidence suggests xylem functionality may decline in developing European plums. Loss of xylem function may have negative consequences for fruit quality. The aim of this study was to establish and localize the loss of xylem functionality, both spatially and temporally using detached fruit. Fruit were detached from the tree under water and fed through a capillary mounted on the cut end of the pedicel. The rate of water movement through the capillary was recorded. Fruit were held above dry silica gel [≈0% relative humidity (RH)] or above water (≈100% RH) to maximize or minimize transpiration, respectively. Water inflow rate depended on developmental stage. It increased from stage I to a maximum at early stage III and then decreased until maturity. Feeding acid fuchsin to developing fruit revealed a progressive decline in dye distribution. The decline progressed basipetally, from the stylar end toward the stem end. At the mature stage III, only the pedicel/fruit junction was stained. The same pattern was observed in four further plum cultivars at the mature stage III. The inflow into early stage III fruit decreased as the RH increased. In contrast, the inflow was less dependent of RH at the mature stage III. Abrading the fruit skin cuticle had no effect on water inflow during early and mature stage III but did markedly increase fruit transpiration rate. Decreasing the osmotic potential (more concentrated) of the feeding solution decreased the water inflow. Our results indicate a progressive loss of xylem functionality in European plum. Transpiration and osmotic pull are the main drivers of this xylem inflow.
format	article
author	Bishnu P. Khanal Indu Acharya Moritz Knoche
author_facet	Bishnu P. Khanal Indu Acharya Moritz Knoche
author_sort	Bishnu P. Khanal
title	Progressive Decline in Xylem Inflow into Developing Plums
title_short	Progressive Decline in Xylem Inflow into Developing Plums
title_full	Progressive Decline in Xylem Inflow into Developing Plums
title_fullStr	Progressive Decline in Xylem Inflow into Developing Plums
title_full_unstemmed	Progressive Decline in Xylem Inflow into Developing Plums
title_sort	progressive decline in xylem inflow into developing plums
publisher	American Society for Horticultural Science (ASHS)
publishDate	2021
url	https://doi.org/10.21273/HORTSCI16012-21 https://doaj.org/article/512b90bafb51473bb610d5fd1a9cd900
work_keys_str_mv	AT bishnupkhanal progressivedeclineinxyleminflowintodevelopingplums AT induacharya progressivedeclineinxyleminflowintodevelopingplums AT moritzknoche progressivedeclineinxyleminflowintodevelopingplums
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Progressive Decline in Xylem Inflow into Developing Plums

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