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Research paper thumbnail of Calla Lily Growth and Development Under Saline Irrigation

Hortscience, Feb 1, 2011

Salinity is a problem for crop production worldwide, which can affect not only the yield of ornam... more Salinity is a problem for crop production worldwide, which can affect not only the yield of ornamental plants, but also their quality. Calla lilies (Zantedeschia K. Koch) are a popular cut flower and landscape plant. In this study we examined how salinity applied either pre-or post-emergence altered shoot growth and flower production compared with standard growth conditions. Salinity applied post-emergence did not significantly affect shoot growth in either the 25-or 50-mM NaCl treatments; however, irrigation with a 50-mM NaCl solution did significantly reduce dry weight and flower production compared with the control. The most drastic effect on flower production was observed when the 50-mM treatment was applied pre-emergence. Although flowering time did not vary among treatments, in the spring, flowering success was less than 50% in the 50-mM treatment, which was significantly less than the other treatments. The plants in all treatments had good visual quality and high relative water content although the shoots of the salt-stressed plants had a Na + content two to five times greater than the control. We hypothesize that the maintenance of visual quality may in part be the result of increased Ca 2+ concentration (up to four times the amount in the control) in the shoots of the saltstressed plants, which may have helped maintain turgor and cell membrane integrity under saline conditions. Our results indicate that use of irrigation water salinized by NaCl with an electrical conductivity (EC) more than twice as high as that recommended for optimal calla growth (1.5 dSÁm-1 compared with 3.4 dSÁm-1) can be used without a loss in plant quality, thereby increasing irrigation options for calla lilies, particularly in areas where high-quality water is scarce.

Research paper thumbnail of Calla Lily Growth and Development

Salinity is a problem for crop production worldwide, which can affect not only the yield of ornam... more Salinity is a problem for crop production worldwide, which can affect not only the yield of ornamental plants, but also their quality. Calla lilies (Zantedeschia K. Koch) are a popular cut flower and landscape plant. In this study we examined how salinity applied either pre- or post-emergence altered shoot growth and flower production compared with standard growth conditions. Salinity applied post-emergence did not significantly affect shoot growth in either the 25- or 50-mM NaCl treatments; however, irrigation with a 50-mM NaCl solution did significantly reduce dry weight and flower production compared with the control. The most drastic effect on flower production was observed when the 50-mM treatment was applied pre-emergence. Although flowering time did not vary among treatments, in the spring,flowering success was less than 50% in the50-mMtreatment,whichwassignificantlylessthantheothertreatments.Theplantsin alltreatmentshadgoodvisualqualityandhighrelative watercontentalthoughthe...

Research paper thumbnail of Mucosal-Associated Invariant T Cells in the Human Gastric Mucosa and Blood: Role in Helicobacter pylori Infection

Frontiers in Immunology, 2015

Research paper thumbnail of Exposure of gastric cell lines (AGS and NCI-N87) to Helicobacter pylori regulates the expression of selected galectins and endogenous neuraminidases

Helicobacter spp. cause prevalent infections worldwide in both humans and animals, and are recogn... more Helicobacter spp. cause prevalent infections worldwide in both humans and animals, and are recognized as the causative agents of chronic gastritis, gastric ulcers and, in some cases, gastric adenocarcinoma and MALT lymphoma. About half of the human population worldwide carries H. pylori, and although this species is perhaps one of the world’s most prevalent pathogens, it remains as one of the least understood. Galectins, a family of soluble β-galactoside-binding proteins, can function as immunoregulators and pattern recognition receptors, and influence tumor progression. We hypothesize that H. pylori dysregulates galectin expression and secretion to favor adhesion and infection, together with efficient translocation of virulence factors such as CagA. Thus, we carried out preliminary studies aimed at gaining further understanding of how the dynamic interplay between H. pylori and host galectins and neuraminidases determines the outcome of the exposure of the gastric epithelium to the...

Research paper thumbnail of Genome sequences of 65 Helicobacter pylori strains isolated from asymptomatic individuals and patients with gastric cancer, peptic ulcer disease, or gastritis

Pathogens and Disease, 2013

This study provides a great resource for the Helicobacter pylori research community. It is the la... more This study provides a great resource for the Helicobacter pylori research community. It is the largest genome sequencing effort in this species so far and it provides an unprecedented overview of genomic diversity within the species. Both the raw data and assembled scaffolds are made available.

Research paper thumbnail of Calla Lily Growth and Development Under Saline Irrigation

HortScience, 2011

Salinity is a problem for crop production worldwide, which can affect not only the yield of ornam... more Salinity is a problem for crop production worldwide, which can affect not only the yield of ornamental plants, but also their quality. Calla lilies (Zantedeschia K. Koch) are a popular cut flower and landscape plant. In this study we examined how salinity applied either pre-or post-emergence altered shoot growth and flower production compared with standard growth conditions. Salinity applied post-emergence did not significantly affect shoot growth in either the 25-or 50-mM NaCl treatments; however, irrigation with a 50-mM NaCl solution did significantly reduce dry weight and flower production compared with the control. The most drastic effect on flower production was observed when the 50-mM treatment was applied pre-emergence. Although flowering time did not vary among treatments, in the spring, flowering success was less than 50% in the 50-mM treatment, which was significantly less than the other treatments. The plants in all treatments had good visual quality and high relative water content although the shoots of the salt-stressed plants had a Na + content two to five times greater than the control. We hypothesize that the maintenance of visual quality may in part be the result of increased Ca 2+ concentration (up to four times the amount in the control) in the shoots of the saltstressed plants, which may have helped maintain turgor and cell membrane integrity under saline conditions. Our results indicate that use of irrigation water salinized by NaCl with an electrical conductivity (EC) more than twice as high as that recommended for optimal calla growth (1.5 dSÁm-1 compared with 3.4 dSÁm-1) can be used without a loss in plant quality, thereby increasing irrigation options for calla lilies, particularly in areas where high-quality water is scarce.

Research paper thumbnail of Calla Lily Growth and Development Under Saline Irrigation

Hortscience, Feb 1, 2011

Salinity is a problem for crop production worldwide, which can affect not only the yield of ornam... more Salinity is a problem for crop production worldwide, which can affect not only the yield of ornamental plants, but also their quality. Calla lilies (Zantedeschia K. Koch) are a popular cut flower and landscape plant. In this study we examined how salinity applied either pre-or post-emergence altered shoot growth and flower production compared with standard growth conditions. Salinity applied post-emergence did not significantly affect shoot growth in either the 25-or 50-mM NaCl treatments; however, irrigation with a 50-mM NaCl solution did significantly reduce dry weight and flower production compared with the control. The most drastic effect on flower production was observed when the 50-mM treatment was applied pre-emergence. Although flowering time did not vary among treatments, in the spring, flowering success was less than 50% in the 50-mM treatment, which was significantly less than the other treatments. The plants in all treatments had good visual quality and high relative water content although the shoots of the salt-stressed plants had a Na + content two to five times greater than the control. We hypothesize that the maintenance of visual quality may in part be the result of increased Ca 2+ concentration (up to four times the amount in the control) in the shoots of the saltstressed plants, which may have helped maintain turgor and cell membrane integrity under saline conditions. Our results indicate that use of irrigation water salinized by NaCl with an electrical conductivity (EC) more than twice as high as that recommended for optimal calla growth (1.5 dSÁm-1 compared with 3.4 dSÁm-1) can be used without a loss in plant quality, thereby increasing irrigation options for calla lilies, particularly in areas where high-quality water is scarce.

Research paper thumbnail of Calla Lily Growth and Development

Salinity is a problem for crop production worldwide, which can affect not only the yield of ornam... more Salinity is a problem for crop production worldwide, which can affect not only the yield of ornamental plants, but also their quality. Calla lilies (Zantedeschia K. Koch) are a popular cut flower and landscape plant. In this study we examined how salinity applied either pre- or post-emergence altered shoot growth and flower production compared with standard growth conditions. Salinity applied post-emergence did not significantly affect shoot growth in either the 25- or 50-mM NaCl treatments; however, irrigation with a 50-mM NaCl solution did significantly reduce dry weight and flower production compared with the control. The most drastic effect on flower production was observed when the 50-mM treatment was applied pre-emergence. Although flowering time did not vary among treatments, in the spring,flowering success was less than 50% in the50-mMtreatment,whichwassignificantlylessthantheothertreatments.Theplantsin alltreatmentshadgoodvisualqualityandhighrelative watercontentalthoughthe...

Research paper thumbnail of Mucosal-Associated Invariant T Cells in the Human Gastric Mucosa and Blood: Role in Helicobacter pylori Infection

Frontiers in Immunology, 2015

Research paper thumbnail of Exposure of gastric cell lines (AGS and NCI-N87) to Helicobacter pylori regulates the expression of selected galectins and endogenous neuraminidases

Helicobacter spp. cause prevalent infections worldwide in both humans and animals, and are recogn... more Helicobacter spp. cause prevalent infections worldwide in both humans and animals, and are recognized as the causative agents of chronic gastritis, gastric ulcers and, in some cases, gastric adenocarcinoma and MALT lymphoma. About half of the human population worldwide carries H. pylori, and although this species is perhaps one of the world’s most prevalent pathogens, it remains as one of the least understood. Galectins, a family of soluble β-galactoside-binding proteins, can function as immunoregulators and pattern recognition receptors, and influence tumor progression. We hypothesize that H. pylori dysregulates galectin expression and secretion to favor adhesion and infection, together with efficient translocation of virulence factors such as CagA. Thus, we carried out preliminary studies aimed at gaining further understanding of how the dynamic interplay between H. pylori and host galectins and neuraminidases determines the outcome of the exposure of the gastric epithelium to the...

Research paper thumbnail of Genome sequences of 65 Helicobacter pylori strains isolated from asymptomatic individuals and patients with gastric cancer, peptic ulcer disease, or gastritis

Pathogens and Disease, 2013

This study provides a great resource for the Helicobacter pylori research community. It is the la... more This study provides a great resource for the Helicobacter pylori research community. It is the largest genome sequencing effort in this species so far and it provides an unprecedented overview of genomic diversity within the species. Both the raw data and assembled scaffolds are made available.

Research paper thumbnail of Calla Lily Growth and Development Under Saline Irrigation

HortScience, 2011

Salinity is a problem for crop production worldwide, which can affect not only the yield of ornam... more Salinity is a problem for crop production worldwide, which can affect not only the yield of ornamental plants, but also their quality. Calla lilies (Zantedeschia K. Koch) are a popular cut flower and landscape plant. In this study we examined how salinity applied either pre-or post-emergence altered shoot growth and flower production compared with standard growth conditions. Salinity applied post-emergence did not significantly affect shoot growth in either the 25-or 50-mM NaCl treatments; however, irrigation with a 50-mM NaCl solution did significantly reduce dry weight and flower production compared with the control. The most drastic effect on flower production was observed when the 50-mM treatment was applied pre-emergence. Although flowering time did not vary among treatments, in the spring, flowering success was less than 50% in the 50-mM treatment, which was significantly less than the other treatments. The plants in all treatments had good visual quality and high relative water content although the shoots of the salt-stressed plants had a Na + content two to five times greater than the control. We hypothesize that the maintenance of visual quality may in part be the result of increased Ca 2+ concentration (up to four times the amount in the control) in the shoots of the saltstressed plants, which may have helped maintain turgor and cell membrane integrity under saline conditions. Our results indicate that use of irrigation water salinized by NaCl with an electrical conductivity (EC) more than twice as high as that recommended for optimal calla growth (1.5 dSÁm-1 compared with 3.4 dSÁm-1) can be used without a loss in plant quality, thereby increasing irrigation options for calla lilies, particularly in areas where high-quality water is scarce.