NDLI: Effects of Ethephon on Key Enzymes of Sucrose Metabolism in Relation to Sucrose Accumulation in Sugarcane

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Effects of Ethephon on Key Enzymes of Sucrose Metabolism in Relation to Sucrose Accumulation in Sugarcane

Content Provider	Springer Nature Link
Author	Wang, Ai Qin Huang, Wen Jing Niu, Jun Qi Liu, Ming Yang, Li Tao Li, Yang Rui
Copyright Year	2013
Abstract	Sucrose synthase (SS), sucrose phosphate synthase (SPS), soluble acid invertase (SAI) and neutral invertase (NI) are the key enzymes of sucrose metabolism, which activities play key role in sugar accumulation. In the present study, sugarcane variety GT28 was used as the plant material, effects of ethephon, an ethylene releasing agent, on the key enzymes of sucrose metabolism and ethylene production in relation to sucrose accumulation in sugarcane stalk and leaves were analyzed. The plants were treated by foliar spray of 400 mg/L ethephon at late growth stage. The results showed that ethylene production in leaves was positively while that in stalk internodes was negatively correlated with the maturity of leaves and stalks. The activities of SS, SPS and NI in stalk and leaves were positively while that of NI was negatively correlated with the maturity of stalks and leaves. High concentration of ethephon significantly inhibited the ethylene production and the activities of SS, SPS and NI but increased the activity of SAI enzyme in immature leaves, while promoted the ethylene production and the activities of SS, SPS and NI in maturing and matured leaves and the activity of SAI in maturing leaves but inhibited the activity of SAI in matured leaves. The active duration of ethylene releasing and the effects of ethephon on the key enzymes in leaves lasted for about 5–10 days. The ethylene production was much lower in internodes than in leaves. High concentrations of ethephon significantly increased the ethylene production in all the three different internodes in a short time but longer for immature internode, and it significantly improved the activities of SS, SPS in all the internodes and that of NI in immature and maturing internodes, but inhibited the activity of SAI in the three internodes and that of NI in matured internode. It is suggested that high concentration of ethephon may accelerate the leaf maturity and aging of the matured leaves by increasing ethylene production which could promote the activities of SS, SPS and NI in maturing and matured leaves, and the activity of SAI in immature and maturing leaves, speeding up the sucrose synthesis in maturing and matured leaf and the sucrose transportation from leaves to immature and maturing internodes, resulting in faster sugar accumulation in immature and maturing internodes of the stalks and higher sucrose content in whole cane.
Starting Page	177
Ending Page	186
Page Count	10
File Format	PDF
ISSN	09721525
Journal	Sugar Tech
Volume Number	15
Issue Number	2
e-ISSN	09740740
Language	English
Publisher	Springer-Verlag
Publisher Date	2013-02-05
Publisher Place	India
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Saccharum L. hybrid Ethylene production Key enzyme Sucrose metabolism Sugar accumulation Agriculture
Content Type	Text
Resource Type	Article
Subject	Agronomy and Crop Science

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Effects of Ethephon on Key Enzymes of Sucrose Metabolism in Relation to Sucrose Accumulation in Sugarcane