Effects of shade on plant growth and flower quality in the herbaceous peony (Paeonia lactiflora Pall.)

Copyright © 2012 Elsevier Masson SAS. All rights reserved.

Bibliographische Detailangaben
Veröffentlicht in:Plant physiology and biochemistry : PPB. - 1991. - 61(2012) vom: 15. Dez., Seite 187-96
1. Verfasser: Zhao, Daqiu (VerfasserIn)
Weitere Verfasser: Hao, Zhaojun, Tao, Jun
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2012
Zugriff auf das übergeordnete Werk:Plant physiology and biochemistry : PPB
Schlagworte:Journal Article Research Support, Non-U.S. Gov't Anthocyanins Plant Proteins Malondialdehyde 4Y8F71G49Q Acyltransferases EC 2.3.- flavanone synthetase EC 2.3.1.74 mehr... Phenylalanine Ammonia-Lyase EC 4.3.1.24
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520 |a Copyright © 2012 Elsevier Masson SAS. All rights reserved. 
520 |a Herbaceous peony (Paeonia lactiflora Pall.) is an important ornamental plant used in urban green spaces, but little is known about whether it can grow in a shaded environment or understory. In this study, effects of shade on plant growth and flower quality in the herbaceous peony were investigated. The results showed that P. lactiflora morphology parameters, including plant height, leaf number, stem diameter, branch number, node number and plant crown width, were higher in plants grown with sun exposure compared to those grown in shade; however, opposite trends were observed for the top and middle leaf areas of the plant. Compared with sun exposure, shade decreased P. lactiflora photosynthetic capacity, light saturation point (LSP) and light compensation point (LCP) and increased the apparent quantum yield (AQY), mainly due to declined stomatal conduction (Gs). These decreases caused the soluble sugar, soluble protein and malondialdehyde (MDA) contents to decline, which led to delayed initial flowering date, prolonged flowering time, reduced flower fresh weight, increased flower diameter and faded flower color. Through cloning and expression analysis of anthocyanin biosynthetic genes, we determined that the fading of flower color was the result of reduced anthocyanin content, which was caused by the combined activity of anthocyanin biosynthesis genes and, in particular, of the upstream phenylalanine ammonialyase gene (PlPAL) and chalcone synthase gene (PlCHS). These results could provide us with a theoretical basis for further application of P. lactiflora in the greening of urban spaces and an understanding of the mechanisms behind the changes induced by shade 
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650 4 |a Research Support, Non-U.S. Gov't 
650 7 |a Anthocyanins  |2 NLM 
650 7 |a Plant Proteins  |2 NLM 
650 7 |a Malondialdehyde  |2 NLM 
650 7 |a 4Y8F71G49Q  |2 NLM 
650 7 |a Acyltransferases  |2 NLM 
650 7 |a EC 2.3.-  |2 NLM 
650 7 |a flavanone synthetase  |2 NLM 
650 7 |a EC 2.3.1.74  |2 NLM 
650 7 |a Phenylalanine Ammonia-Lyase  |2 NLM 
650 7 |a EC 4.3.1.24  |2 NLM 
700 1 |a Hao, Zhaojun  |e verfasserin  |4 aut 
700 1 |a Tao, Jun  |e verfasserin  |4 aut 
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