Rhizome transition to storage organ is under phytochrome control in lotus (Nelumbo nucifera).

Rhizome transition to storage organ is under phytochrome control in lotus (Nelumbo nucifera). Research Abstract Details 

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Rhizome transition to storage organ is under phytochrome control in lotus (Nelumbo nucifera). Abstract Text:

Jun-ichiro Masuda,Yukio Ozaki,Hiroshi Okubo,

We examined photoperiodic response of lotus (Nelumbo nucifera) rhizome morphogenesis (its transition to a storage organ) by using seed-derived plants. Rhizome enlargement (increase in girth) was brought about under 8, 10 and 12 h photoperiods, whereas the rhizomes elongated under 13 and 14 h photoperiods. Rhizomes elongated under 14 h light regimes supplied as 8 h of natural light plus 6 h supplemental hours of white, yellow or red light, but similar treatments with supplemental blue, green or far red light, caused enlargement in girth of the rhizomes. A 2 h interruption of the night with white, yellow or red light, in plants entrained to 8 h photoperiod brought rhizome elongation, whereas 2 h-blue, green or far red light night breaks still resulted in rhizome increase in girth. The inhibitory effect of a red (R) light night break on rhizome increase in girth was reversed by a far-red (FR) light given immediately afterwards. Irradiation with R/FR/R inhibited the rhizome increase in girth. FR light irradiation following R/FR/R irradiation cancelled the effect of the last R light irradiation. It was demonstrated that the critical photoperiod for rhizome transition to storage organ is between 12 and 13 h photoperiod. It was also evident that the optimal light quality range for interruption of dark period (night break) is between yellow and red light and that a R/FR reversible reaction is observed. From these results, we propose that phytochrome plays an important role in photoperiodic response of rhizome increase in girth in lotus. This is the first report on phytochrome-dependent morphogenesis of storage organs in rhizomous plants.

Rhizome transition to storage organ is under phytochrome control in lotus (Nelumbo nucifera). Publishing Authors By Initials

J Masuda,Y Ozaki,H Okubo,

For similar plants: plant components: plant components, aerial: plant stems: rhizome research abstracts see: plants: plant components: plant components, aerial: plant stems: rhizome research

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Rhizome transition to storage organ is under phytochrome control in lotus (Nelumbo nucifera). Journal Published:

PUBLICATION TYPE: Research Support, Non-U.S. Gov

Journal: Planta

VOLUME: 226

Page Numbers: 909-15

Journal Abbreviation: Planta

ISSN: 0032-0935

DAY: 23

MONTH: 05

YEAR: 2007

Rhizome transition to storage organ is under phytochrome control in lotus (Nelumbo nucifera). Information

Number of References:

LANGUAGE: eng

NlmUniqueID: 1250576

Rhizome transition to storage organ is under phytochrome control in lotus (Nelumbo nucifera). Keywords Mesh Terms:

KEYWORDS: Rhizome

MESH TERMS: growth & development

Chemical & Substance for Abstract: Rhizome transition to storage organ is under phytochrome control in lotus (Nelumbo nucifera). Information

Substance Name: Phytochrome

Registry Number: 11121-56-5

Grant and Affiliation Information for Rhizome transition to storage organ is under phytochrome control in lotus (Nelumbo nucifera).

AFFILIATION: Laboratory of Horticultural Science, Faculty of Agriculture, Kyushu University, 812-8581 Fukuoka, Japan. j-masuda@agr.kyushu-u.ac.jp

Country: Germany

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MEDLINETA: Planta

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