TITLE:
Accumulation of Sugars and Liquid in Apoplast of Fruit Flesh Result in Pineapple Translucency
AUTHORS:
Haiyan Shu, You Wang, Keming Li, Luqiong He, Lifen Ding, Rulin Zhan, Shenghe Chang
KEYWORDS:
Pineapple, Translucency, Accumulation, Sugars, Apoplast
JOURNAL NAME:
American Journal of Plant Sciences,
Vol.13 No.5,
May
19,
2022
ABSTRACT: Translucency is a recurring problem for pineapple
industry. Translucent fruit contained more sucrose, glucose and fructose in
apoplast than those in apoplast of normal fruit. There were more liquid in
intercellular space of translucent fruit than that of normal flesh. The
contents of alcohol and ethylene in translucent fruit were higher than those in
normal fruit. Translucent fruit contained less calcium than normal fruit.
Electrolyte leakage of translucent flesh was more than that of normal flesh.
There were 205 proteins of which the expressions in translucent flesh were
higher than those in normal flesh. Calcium-ions-binding protein EF-hand
domain-containing protein, ethylene-synthesizing
enzyme 1-aminpcyclopropane-1-carboxylate oxidase, ROS-producing protein
universal stress protein A-like protein were the top three proteins of which
the expressions in translucent flesh were higher than those in normal fruit.
When much sugar was transferred into fruit pulp and accumulated in
intercellular space, water will be absorbed from cells around and translucence
formed. The accumulation of sugar and liquid in apoplast were due to that cell wall and membrane were
degraded, which was from being attacked by ROS. There might be more and larger
pores in cell wall and membranes of translucent flesh. These data played
foundations for researching methods for controlling pineapple translucency.