Carbon and nitrogen reserves of leafy spurge (<i>Euphorbia esula</i>) roots as related to overwintering strategy

Cyr, David R.; Bewley, J. Derek

doi:10.1111/j.1399-3054.1989.tb05979.x

Cited by 52 publications

(52 citation statements)

References 28 publications

(30 reference statements)

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“…The storage proteins usually compose a small part of the total nitrogen pool within the root; their accumulation is related to overwintering. Cyr and Bewley (1989, 1990a, 1990b suggested that, in herbaceous perennial species, some proteins can be used as a temporary nitrogen source to support plant growth when needed.…”

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Protein mobilisation and proteolytic activities in root tubers of Asphodelus aestivus

Kırmızı¹,

Guleryuz²,

Arslan³

2014

Turk J Bot

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IntroductionKnowledge of plant traits is necessary for understanding the ecosystem responses to natural and human-induced environmental changes (Hüseyinova et al., 2013). Geophytes are important life forms among plants with specialised structures in specialised environments. Their regenerating buds are on underground storage organs, and their life cycle includes a dormant period that can extend from a few weeks to most of the year, as defined by Raunkiaer (1934). Geophytes are widespread in the Mediterranean part of the world because they can survive the summer drought (Dafni, 1996;Debussche et al., 2004).The Mediterranean geophytes are of 2 types: springflowering species that display leaves and flowers simultaneously (synanthous geophytes), and autumnalflowering species that develop flowers before leaves and leaves after the flowering (hysteranthous geophytes) (Dafni et al., 1981a). The synanthous geophytes have periods of growth, storage, flowering, and dormancy, whereas the hysteranthous geophytes go dormant after storing the food reserves such that vegetative and reproductive stages do not occur at the same time (Dafni et al., 1981a(Dafni et al., , 1981b.According to Pantis (1993), Asphodelus aestivus Brot. could be categorised as intermediate; it is synanthous, but its reproduction depends partly on stored reserves and partly on annual production. Asphodelus aestivus is one of the important geophytes growing in degraded areas of the Mediterranean environment (Pantis et al., 1994). When it covers the degraded parts of the eastern Mediterranean basin, these types of ecosystems appear like deserts, and they are called asphodel geophyte-deserts or asphodel semideserts (Naveh, 1973;Ayyad and Hilmy, 1974;Le Houerou, 1981).Asphodelus aestivus is a competitive ruderal stresstolerant strategist species, which can be found on agricultural slopes, near roads, and in calcareous soils in pastures (Pantis et al., 1994). Asphodelus aestivus is an important plant and it has become the dominant life form in some degraded Mediterranean ecosystems, including those resulting from excessive grazing and fire (Ayyad and Hilmy, 1974;Le Houerou, 1981;Pantis and Margaris, 1988). Pantis and Margaris (1988) reported that the dominance of Asphodelus aestivus in degraded areas reflects both its capacity to face the peculiarities of the Mediterranean climate and its resistance to the most common disturbances in habitat.Geophytes mainly store one or more storage compounds in their underground storage organs. They generally accumulate carbohydrates, starch, soluble sugars, glucomannans, and fructans (

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Protein mobilisation and proteolytic activities in root tubers of Asphodelus aestivus

Kırmızı¹,

Guleryuz²,

Arslan³

2014

Turk J Bot

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“…Vegetative storage proteins have been isolated from various plant organs including soybean pods and leaves (19), potato and yam tubers (7,16), and roots of perennial weeds (4) and from the wood, bark, and leaves of temperate trees (6,8,17,21,24,26). In general, they are not homologous to seed storage proteins of the same species (19).…”

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The 32-Kilodalton Vegetative Storage Protein of Salix microstachya Turz

Wetzel

Greenwood²

1991

Plant Physiol.

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A 32-kilodalton vegetative storage protein, found in Salix microstachya Turz. bark during the overwintering period, was purified and characterized using several polyacrylamide gel electrophoretic procedures. Solubility characteristics and amino acid analyses were also performed. The protein is water soluble, is glycosylated, has no disulfide-bonded subunits, but is composed of a family of isoelectric isomers. The majority of these isomers are basic. Characteristic of storage proteins, the protein is rich in glutamine/glutamate and asparagine/aspartate (28%), the basic nature of the isomers indicating that most of these amino acid residues are in the amide form. The protein was purified using preparative sodium dodecyl sulfate-polyacrylamide gel electrophoresis and antibodies raised in chickens. Immunoblot analysis suggested an annual cyclic nature of the accumulation and mobilization of this vegetative storage protein. Immunologically, it is related to a similar molecular weight protein found in the bark of Populus deftoides Marsh. but not to any overwintering storage proteins of the other hardwoods tested. Indirect immunolocalization revealed that the protein was sequestered in proteinstorage vacuoles in parenchymatous cells of the inner bark tissues of Salix during the winter months.

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“…Heaton (1987) and Ehleringer et al (2001) showed the same results, which can be explained by a previous study that linked an increase in δ 15 N values to an increase in humidity (Gremaud and Hilkert, 2009). The problem is that nitrogen is indiscriminant, and nitrogencontaining reserves (amino acids, e.g., arginine, glutamine, and aspartic acid) in xylem could be contributing (Cyr and Bewley, 1989). Because of the perennial growth properties of tea, the early development and growth of buds and leaves is sustained using nitrogen reserves stored in the xylem (Ta et al, 1990;Moing et al, 1994) in different years under different fertilization conditions.…”

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Determination of the geographical origin of Chinese teas based on stable carbon and nitrogen isotope ratios

Long

Jia-rong

2012

J. Zhejiang Univ. Sci. B

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Abstract:The objective of this study was to investigate the geographical origin of Chinese teas using carbon and nitrogen stable isotope ratio technology. The results showed that inter-provincial dispersion of teas in Guangdong (GD), Guangxi (GX), Hainan (HA), Fujian (FJ), Shandong (SD), Sichuan (SC), Chongqing (CQ), and Henan (HN) provinces was high, while in Zhejiang (ZJ), Hubei (HB), Yunnan (YN), and Anhui (AH) provinces, it was low. Tea samples from GD, GX, HA, and FJ provinces were clustered in one group and separated from those from AH and HB provinces. Thus, carbon and nitrogen stable isotope ratio technology could discriminate teas from among some provinces of China, but not from among others. Better separation might be obtained with a combination of isotopic ratios and other indexes, such as elemental data and organic components.

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Carbon and nitrogen reserves of leafy spurge (Euphorbia esula) roots as related to overwintering strategy

Cited by 52 publications

References 28 publications

Protein mobilisation and proteolytic activities in root tubers of Asphodelus aestivus

Protein mobilisation and proteolytic activities in root tubers of Asphodelus aestivus

The 32-Kilodalton Vegetative Storage Protein of Salix microstachya Turz

Determination of the geographical origin of Chinese teas based on stable carbon and nitrogen isotope ratios

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