Abstract：
:The distribution of the endogenous PA fractions throughout the entire perennial woody grapevine (Vitis vinifera L.) plant was studied, along with the expression profiles of the PA anabolic and catabolic genes and their substrates and secondary metabolites. Putrescine fractions increased with increasing leaf age, although the expression of its biosynthetic enzymes Arg and Orn decarboxylases decreased. Orn transport from young organs dramatically enhanced putrescine biosynthesis in older tissues, via the Orn decarboxylase pathway. S-adenosylmethionine decarboxylase and spermidine synthase genes were down-regulated during development in a tissue/organ-specific manner, as were spermidine and spermine levels. In contrast, amine oxidases, peroxidases and phenolics increased from the youngest to the fully developed vascular tissues; they also increased from the peripheral regions of leaves to the petioles. Hydrogen peroxide generated by amine oxidases accumulated for the covalent linkage of proteins via peroxidases during lignification. These results could be valuable for addressing further questions on the role of PAs in plant development.
journal_name
J Plant Physioljournal_title
Journal of plant physiologyauthors
Paschalidis KA,Moschou PN,Toumi I,Roubelakis-Angelakis KAdoi
10.1016/j.jplph.2009.03.013subject
Has Abstractpub_date
2009-09-15 00:00:00pages
1508-19issue
14eissn
0176-1617issn
1618-1328pii
S0176-1617(09)00130-8journal_volume
166pub_type
杂志文章abstract：:Metabolic engineering of plants allows the possibility of using crops for the synthesis of novel polymers having useful material properties. Strong and flexible protein-based polymers, which are based on the structure of silk and elastin have been synthesized in transgenic plants. A wide range of polyhydroxyalkanoates...
journal_title：Journal of plant physiology
pub_type： 杂志文章,评审
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abstract：:A cold-tolerant line (NY-1) and a cold-sensitive cultivar (Jinyan 4) of cucumber (Cucumis sativus) were treated with temperatures of 28 degrees C/22 degrees C or 28 degrees C/12 degrees C (day/night) in a 10-h photoperiod. Carbohydrates and related enzymes were assayed from 0 to 4 h after the start of the dark period....
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abstract：:A critical stage in pollen development is the dissolution of tetrads into free microspores. Tetrads are surrounded by a wall composed primarily of beta-1,3-glucan. At the completion of meiosis, tetrads are released into the anther locule after hydrolysis of the callose by a beta-1,3-glucanase complex. The cDNA corresp...
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pub_type： 杂志文章
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pub_type： 杂志文章
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pub_type： 杂志文章
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journal_title：Journal of plant physiology
pub_type： 杂志文章
doi：10.1016/j.jplph.2014.09.016
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journal_title：Journal of plant physiology
pub_type： 杂志文章
doi：10.1078/0176-1617-00194
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abstract：:In order to examine whether polyamines (PAs) modify the functioning of the scavenging system and oxidative stress levels in water-stressed plants, cucumber (Cucumis sativus L.) seedlings were treated with spermidine (Spd) prior to dehydration, and stress-evoked changes in superoxide dismutase (SOD) (EC 1.15.1.1), cata...
journal_title：Journal of plant physiology
pub_type： 杂志文章
doi：10.1016/j.jplph.2007.02.005
更新日期：2008-03-13 00:00:00
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journal_title：Journal of plant physiology
pub_type： 杂志文章
doi：10.1016/j.jplph.2010.03.014
更新日期：2010-09-01 00:00:00
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pub_type： 杂志文章
doi：10.1016/j.jplph.2009.04.011
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abstract：:Salicylic acid (SA), 2-hydroxy benzoic acid, is a small phenolic compound with multifunction that is involved in plant growth, development, and the acquisition of stress tolerance. In recent years, hydrogen sulfide (H2S) has been found to have similar functions, but cross talk between SA and H2S in the acquisition of ...
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abstract：:Since sweetness is one of the most important qualities of many fruits, and since sugars are translocated from leaves to fruits, the present study investigates photosynthetic activity, activity of sugar metabolizing enzymes, sugar content in leaves and fruits and endogenous levels of hydrogen peroxide in leaves of melo...
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