NDLI: Response of Endogenous Hormone Concentrations to Two Floral Inductive Treatments, viz. KNO$_{3}$ and PBZ, in Mango cv. ‘Tommy Atkins’ Growing Under Tropical Conditions

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Response of Endogenous Hormone Concentrations to Two Floral Inductive Treatments, viz. KNO$_{3}$ and PBZ, in Mango cv. ‘Tommy Atkins’ Growing Under Tropical Conditions

Tropical Plant Biology : Volume 5, Issue 2, June 2012

Tropical Plant Biology : Volume 5, Issue 1, March 2012

Tropical Plant Biology : Volume 4

Tropical Plant Biology : Volume 3

Tropical Plant Biology : Volume 2

Tropical Plant Biology : Volume 1

Response of Endogenous Hormone Concentrations to Two Floral Inductive Treatments, viz. KNO$_{3}$ and PBZ, in Mango cv. ‘Tommy Atkins’ Growing Under Tropical Conditions

Content Provider	Springer Nature Link
Author	Guevara, Eric Jiménez, Víctor M. Bangerth, Fritz K.
Copyright Year	2012
Abstract	Floral induction (FI) has been intensively studied in mango, more under sub-tropical than under tropical environments. Decreases in temperature below 20 °C, which is common in sub-tropical regions but seldom occurs in many tropical ones, has been considered a critical factor for FI in this species. Trying to understand the way by which two FI treatments, potassium nitrate (KNO$_{3}$) and paclobutrazol (PBZ), can regulate flowering by modulating the endogenous concentrations of plant hormones, the following compounds were analyzed in terminal buds, wood and bark sections of lateral branches from treated and untreated ‘Tommy Atkins’ mango trees growing under tropical conditions: indole-acetic acid (IAA), gibberellins (GAs), zeatin/zeatin riboside (Z/ZR) and N $^{ 6 }$(Δ$^{2}$-isopentenyl) adenine/N $^{ 6 }$(Δ$^{2}$-isopentenyl) adenosine. Behavior in the contents of these endogenous hormones was often irregular but their course was in general similar for all three treatments. However, levels of GAs were consistently lower in most evaluations of wood and bark sections of PBZ-treated trees compared to KNO$_{3}$-treated and control plants. In contrast, the endogenous levels of the presumably FI promoting Z/ZR raised considerably at the time close to FI in buds of KNO$_{3}$-treated trees. These KNO$_{3}$-treated trees flowered earlier and more profusely than those from other treatments. Although PBZ could be related in this work to a reduction in GA contents, no direct influence of this compound over FI could be established. KNO$_{3}$ might partially exert its promoting effect on mango FI by increasing Z/ZR contents.
Starting Page	253
Ending Page	260
Page Count	8
File Format	PDF
ISSN	19359756
Journal	Tropical Plant Biology
Volume Number	5
Issue Number	3
e-ISSN	19359764
Language	English
Publisher	Springer-Verlag
Publisher Date	2012-07-20
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Mangifera indica Paclobutrazol Potassium nitrate Transgenics Plant Breeding/Biotechnology Plant Ecology Plant Genetics & Genomics Plant Sciences
Content Type	Text
Resource Type	Article
Subject	Genetics Plant Science

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