Variation in nutrition along time and relative chlorophyll content of Leucospermum cordifolium cv. ‘High Gold’, and their relationship with chlorotic sypmptoms

Fernández‐Falcón, Marino; Hernández, María Mercedes Arias; Álvarez, Carlos E.; Borges, Andrés A.

doi:10.1016/j.scienta.2005.08.009

Cited by 23 publications

(16 citation statements)

References 10 publications

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“…Relative chlorophyll content (SPAD value in fresh leaves) was measured as described by Fernández-Falcón et al (2006) with Chlorophyll Meter SPAD-502 (Minolta, Japan). The experiments were conducted at 9-11 a.m. of sunny days.…”

Section: Measurement Of Photosynthesismentioning

confidence: 99%

IbSIMT1, a novel salt-induced methyltransferase gene from Ipomoea batatas, is involved in salt tolerance

Liu

Song

et al. 2014

Plant Cell Tiss Organ Cult

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S-adenosyl-methionine (SAM)-dependent methyltransferase (MTase) genes are a multigene family; however, only a few have been characterized at the functional level. In the present study, a novel salt-induced SAM-dependent MTase gene, named IbSIMT1, was isolated from salt-tolerant sweetpotato (Ipomoea batatas (L.) Lam.) line ND98. IbSIMT1 contains a DUF248 domain of unknown function and an MTase domain. Expression of IbSIMT1 was up-regulated in sweetpotato under salt stress and abscisic acid treatment. The IbSIMT1-overexpressing sweetpotato (cv. Shangshu 19) plants exhibited significantly higher salt tolerance compared with the wild-type. Proline content was significantly increased, whereas malonaldehyde content was significantly decreased in the transgenic plants. The activities of superoxide dismutase (SOD) and photosynthesis were significantly enhanced in the transgenic plants. H 2 O 2 was also found to be significantly less accumulated in the transgenic plants than in the wild-type. Overexpression of IbSIMT1 up-regulated the salt stress responsive genes, including pyrroline-5-carboxylate synthase, pyrroline-5-carboxylate reductase, SOD, psbA and phosphoribulokinase genes under salt stress.These findings suggest that the novel IbSIMT1 gene is involved in sweetpotato salt tolerance and enhances salt tolerance of the transgenic sweetpotato plants by regulating osmotic balance, protecting membrane integrity and photosynthesis and increasing reactive oxygen species scavenging capacity.

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Section: Measurement Of Photosynthesismentioning

confidence: 99%

IbSIMT1, a novel salt-induced methyltransferase gene from Ipomoea batatas, is involved in salt tolerance

Liu

Song

et al. 2014

Plant Cell Tiss Organ Cult

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“…The treatment was carried out at a constant temperature of 25°C with supplementary light for 16 h per day for 5 days. SPAD meter is used to measure chlorophyll content of plant as described (Fernandez-Falcon et al 2006); relative chlorophyll content (SPAD value in fresh leaves) was measured everyday by Chlorophyll Meter SPAD-502 (Konica Minolta, Beijing, China). Each measurement represents mean value of 12 discs from three leaves with 4 discs for each leaf.…”

Section: Plant Materials and Growth Conditionsmentioning

confidence: 99%

A tomato glutaredoxin gene SlGRX1 regulates plant responses to oxidative, drought and salt stresses

Guo

Huang

Song

et al. 2010

Planta

103

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Glutaredoxins (Grxs) are ubiquitous small heat-stable disulfide oxidoreductases that play a crucial role in plant development and response to oxidative stress. Here, a novel cDNA fragment (SlGRX1) from tomato encoding a protein containing the consensus Grx family domain with a CGFS active site was isolated and characterized. Southern blot analysis indicated that SlGRX1 gene had a single copy in tomato genome. Quantitative real-time RT-PCR analysis revealed that SlGRX1 was expressed ubiquitously in tomato including leaf, root, stem and flower, and its expression could be induced by oxidative, drought, and salt stresses. Virus-induced gene silencing mediated silencing of SlGRX1 in tomato led to increased sensitivity to oxidative and salt stresses with decreased relative chlorophyll content, and reduced tolerance to drought stress with decreased relative water content. In contrast, over-expression of SlGRX1 in Arabidopsis plants significantly increased resistance of plants to oxidative, drought, and salt stresses. Furthermore, expression levels of oxidative, drought and salt stress related genes Apx2, Apx6, and RD22 were up-regulated in SlGRX1-overexpressed Arabidopsis plants when analyzed by quantitative real-time PCR. Our results suggest that the Grx gene SlGRX1 plays an important role in regulating abiotic tolerance against oxidative, drought, and salt stresses.

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“…and 'Safari Sunset', and than those obtained by Fernández-Falcón et al (2006) in Leucospermum cordifolium and Leucospermum patersonii. On the contrary, those found in plants of T I (5 mg L -1 of P) were similar to those analysed by Claassens (1986) in Leucospermum cordifolium and Leucospermum patersonii grown in sand culture.…”

Section: Discussionmentioning

confidence: 54%

“…The fertilization of different Proteaceae species has been studied for some time (Groves and Keraitis, 1976;Thomas, 1979;Claassens, 1986;Fernández-Falcón et al, 2006), but it frequently becomes obvious that knowledge in this regard is scant. Such studies usually focus on the role played by proteoid roots, which are an adaptation of the Proteaceae to low phosphorus (P) supply (Lamont, 2003), and on the problems caused by phosphorus (Gilbert et al, 2000;Hawkins et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

Effect of the Concentration of Phosphorus on Growth and Nutrition ofLeucospermum cordifolium‘Flame Spike’

Corbella-Tena

Fernández‐Falcón

Rodríguez-Pérez

2014

Journal of Plant Nutrition

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The aim of this study was to determine how phosphorus (P) concentration affects growth, concentration and distribution of nutrients in Leucospermum cordifolium 'Flame Spike' (Proteaceae). The trials were performed at the School of Agriculture (ETSIA) of the University of La Laguna (28° 28' 43" N, 16° 19' 7" W) with 64 plants (1-year-old) grown for 12 months in silica sand, fed with nutrient solutions containing different levels of P i (5, 10, 15 and 20 mg L -1 ).At 6, 9, and 12 months, whole plants were taken from each experimental unit and divided into root, stem (main, first, second, and third growth) and leaves (adult, first, second, and third growth), which were measured, weighed, and analysed. The data enabled a nutritional diagnosis, including the limiting P concentrations and nutrient interactions. P concentrations above 5 mg L -1 caused a reduction in growth, which in the third samples was significant (P<0.05). Plants treated with 15 and 20 mg L -1 P attained similar dry weights (P> 0.05). Some young leaves showed a certain degree of chlorosis, probably due to iron (Fe) deficiency. Fully developed young leaves (YFEL) were suitable for nutritional diagnosis of P, and the P concentration of the nutrient solution affected the foliar manganese (Mn) concentration. This latter factor was related to the zinc (Zn) concentration in the roots.

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Variation in nutrition along time and relative chlorophyll content of Leucospermum cordifolium cv. ‘High Gold’, and their relationship with chlorotic sypmptoms

Cited by 23 publications

References 10 publications

IbSIMT1, a novel salt-induced methyltransferase gene from Ipomoea batatas, is involved in salt tolerance

IbSIMT1, a novel salt-induced methyltransferase gene from Ipomoea batatas, is involved in salt tolerance

A tomato glutaredoxin gene SlGRX1 regulates plant responses to oxidative, drought and salt stresses

Effect of the Concentration of Phosphorus on Growth and Nutrition ofLeucospermum cordifolium‘Flame Spike’

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