نتایج جستجو برای: petals carotenoid

تعداد نتایج: 8456  

2012
Takashi Nakatsuka Misa Saito Eri Yamada Kohei Fujita Yuko Kakizaki Masahiro Nishihara

Flavonoids are one of the major plant pigments for flower colour. Not only coloured anthocyanins, but also co-pigment flavones or flavonols, accumulate in flowers. To study the regulation of early flavonoid biosynthesis, two R2R3-MYB transcription factors, GtMYBP3 and GtMYBP4, were identified from the petals of Japanese gentian (Gentiana triflora). Phylogenetic analysis showed that these two pr...

2017
Shaoxiong Liu Linjian Liu Xiaofang Huang Yuye Zhu Yanqin Xu

Due to some common or similar features (e.g., small leaf, spurless, yellow flower), three Chinese species of the genus Epimedium (Berberidaceae), E. ecalcaratum, E. platypetalum, and E. campanulatum, are controversial based on morphological characteristics. In the present study, the descriptions of morphological characteristics for the three species were revised based on extensive studies and o...

Journal: :Development 1999
M E Griffith A da Silva Conceição D R Smyth

PETAL LOSS is a new class of flower development gene whose mutant phenotype is confined mostly to the second whorl. Two properties are disrupted, organ initiation and organ orientation. Initiation is frequently blocked, especially in later-formed flowers, or variably delayed. The few petals that arise occupy a wider zone of the flower primordium than normal. Also, a minority of petals are trump...

2004
Takashi Ijiri Takeo Igarashi Shin Takahashi Etsuya Shibayama

3D flower models are important components for impressive virtual reality environments. However, flowers’ leaves or petals are 3D free curved-surfaces and they are very difficult to model. We present a user interface with which the user can easily model flowers using freehand sketches. The user interfaces for generation, transformation, and copy are specialized to model leaves and petals, and th...

2007
Roland R. Dute Brian E. Jackson Ryan D. Adkins Debbie R. Folkerts

A study was undertaken to compare the anatomy of the laminar floral parts with that of the spathes and leaves of Commelina erecta L. Each flower has two types of petals and two types of sepals. In contrast to the other organs, the petals have a completely open venation system whose vein endings consist solely of modified bundle-sheath cells. Bundle sheaths of leaves and spathes, but not the flo...

Journal: :Physiological and biochemical zoology : PBZ 2010
Susan M Lin Katherine Nieves-Puigdoller Alexandria C Brown Kevin J McGraw Ethan D Clotfelter

Many animals use carotenoid pigments derived from their diet for coloration and immunity. The carotenoid trade-off hypothesis predicts that, under conditions of carotenoid scarcity, individuals may be forced to allocate limited carotenoids to either coloration or immunity. In polychromatic species, the pattern of allocation may differ among individuals. We tested the carotenoid trade-off hypoth...

Journal: :Journal of evolutionary biology 2006
P S Fitze B Tschirren

In several vertebrate species evidence supports the hypothesis that carotenoid-based coloration of adults has evolved due to sexual selection. However, in some birds already the nestlings display carotenoid-based coloration. Because the nestling's body plumage is typically moulted before the first reproductive event, sexual selection cannot explain the evolution of these carotenoid-based traits...

Journal: :Journal of evolutionary biology 2005
I T van Der Veen

Carotenoid reserves in copepods seem costly in terms of predation risk because they make individuals conspicuous. However, carotenoids also seem to play an important role in immune defence as free radical scavengers. To test whether predation risk influences carotenoid levels and whether changes in carotenoid levels are related to changes in immune defence, I examined individual changes in larg...

Journal: :Plant physiology 2015
Hui Yuan Katherine Owsiany T E Sheeja Xiangjun Zhou Caroline Rodriguez Yongxi Li Ralf Welsch Noam Chayut Yong Yang Theodore W Thannhauser Mandayam V Parthasarathy Qiang Xu Xiuxin Deng Zhangjun Fei Ari Schaffer Nurit Katzir Joseph Burger Yaakov Tadmor Li Li

Carotenoids are crucial for plant growth and human health. The finding of ORANGE (OR) protein as a pivotal regulator of carotenogenesis offers a unique opportunity to comprehensively understand the regulatory mechanisms of carotenoid accumulation and develop crops with enhanced nutritional quality. Here, we demonstrated that alteration of a single amino acid in a wild-type OR greatly enhanced i...

Journal: :Infection and immunity 1991
N R Chamberlain B G Mehrtens Z Xiong F A Kapral J L Boardman J I Rearick

Staphylococcus aureus is susceptible to killing by host-derived fatty acids. Studies were performed to test for a correlation between carotenoid production by S. aureus and protection against oleic acid. Oleic acid killing of cells grown in carotenoid expression medium was determined as the dosage of oleic acid in 2 M NaCl-2 mM EDTA that would kill 20% of the cells in 60 min at 37 degrees C (i....

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