Vessel-diameter distribution in roots of grapevines (Vitis vinifera L. cv. Shiraz)

Mapfumo, E.; Aspinall, D.; Hancock, T. W.

doi:10.1007/bf00150345

Cited by 16 publications

(7 citation statements)

References 15 publications

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“…Previous investigations have shown that xylem vessels under stress, when compared with control vessels, will decrease in diameter and will be distributed in different patterns about the stele of the plant (Mapfumo, Aspinall, and Hancock 1994). Furthermore, this pigeon pea study revealed that stress became more pronounced as the experiment progressed from 2 to 64 days.…”

Section: Discussionmentioning

confidence: 80%

Morphology, Biomass, and Vessel Diameter of Pigeon Pea Subjected to Water Stress

Porter¹,

Bidlack

2011

Communications in Soil Science and Plant Analysis

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This research was designed to study the effects of drought on pigeon pea [Cajanus cajan (L.) Millsp.] morphology, biomass, and vessel diameter. Cultivated seeds of pigeon pea (cv. Georgia-II) were germinated, maintained in an environmental chamber, and arranged as a split-plot design with four replications; harvest was the main effect and watering regimens were tested against residual error. Plants were watered every 2, 4, 8, 16, or 32 days. Number of stems and leaves, as well as total plant height, were measured weekly. Dry weight (DW) of roots, stems, and leaves were recorded at each harvest, and root cross sections were viewed to determine vessel diameter. Results indicated that plant morphology, biomass, and vessel diameter were significantly affected by harvest and watering regimen. Plants watered more frequently had more stems and leaves, grew taller, accumulated greater DW, and had larger diameter vessels within root tissue.

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Section: Discussionmentioning

confidence: 80%

Morphology, Biomass, and Vessel Diameter of Pigeon Pea Subjected to Water Stress

Porter¹,

Bidlack

2011

Communications in Soil Science and Plant Analysis

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“…6 provides a visual summary of steady‐state ion levels in the different cell types of salinized grapevine roots. Ten to 12 millimetre basipetal to the root tip the vascular tissue contains mainly protoxylem (Mapfumo, Aspinall & Hancock 1994) and therefore the contribution of this region of the root to Cl – accumulation in the shoot is unknown. The lack of data on the functionality of xylem in this region of the grapevine root limits the conclusions that can be made about the contributions that this region makes to the Cl – content of shoots.…”

Section: Discussionmentioning

confidence: 99%

“…The control of Cl – accumulation is still not fully understood although hypotheses have been proposed (Cram 1983). Our data show that cortical cells across the root have similar Cl – content, but the Cl – content for the hypodermis and the endodermis were lower than those of the cortex and pericycle.…”

Section: Discussionmentioning

confidence: 99%

Root structure and cellular chloride, sodium and potassium distribution in salinized grapevines

Storey

Schachtman

Thomas³

2003

Plant Cell & Environment

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X-ray microanalysis was used to study the patterns of K + + + + , Na + + + + and Cl -accumulation in salinized (25 m M NaCl) and non-salinized grapevine ( Vitis ) roots. The aim was to determine whether NaCl affects patterns of Cl -accumulation differentially in the roots of a Cl --excluding genotype and a non-excluding genotype. Two regions of fibrous roots were analysed: (1) a region 2-3 mm basipetal to the root tip; and (2) a region of the root 10-12 mm basipetal to the root tip where the outermost layer is the hypodermis. The ion contents of the hypodermis, cortex, endodermis and pericycle vacuoles were analysed. Data were also collected from the cytoplasm of the endodermal and pericycle cells. The analyses showed that the ion profiles of the hypodermis and the endodermis were significantly different from those of the cortex and pericycle. The hypodermis and endodermis had higher K + + + + and lower Na + + + + and Cl -than surrounding cells. Some changes due to salinity such as increased K + + + + concentrations in the hypodermis were also noted. Chloride concentrations did not differ between the genotypes in the hypodermis, across the cortex or in the endodermis, but were higher in the pericycle of the excluder in comparison with the non-excluding genotype. However, K + + + + /Na + + + + ratios of the cortex and endodermis were higher in the excluder. The pericycle cells exhibited the greatest ability to sequester Na + + + + and Cl -in vacuoles. Overall the data show cell-type-specific ion accumulation patterns and small but significant differences were found between genotypes. The possibility that these accumulation patterns arise from differences in uptake properties of cell types and/or result from the spatial distribution of the cell types along the competing symplastic and apoplastic ion transport pathways across the root is discussed.

show abstract

“…6 provides a visual summary of steady-state ion levels in the different cell types of salinized grapevine roots. Ten to 12 millimetre basipetal to the root tip the vascular tissue contains mainly protoxylem (Mapfumo, Aspinall & Hancock 1994) and therefore the contribution of this region of the root to Claccumulation in the shoot is unknown. The lack of data on the functionality of xylem in this region of the grapevine root limits the conclusions that can be made about the contributions that this region makes to the Clcontent of shoots.…”

Section: Summary Of Ion Distribution Patterns In Grapevine Rootsmentioning

confidence: 99%

Root structure and cellular chloride, sodium and potassium distribution in salinized grapevines

Storey¹,

Schachtman²,

Thomas³

2003

Plant Cell Environ

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X-ray microanalysis was used to study the patterns of K + + + + , Na + + + + and Claccumulation in salinized (25 m M NaCl) and non-salinized grapevine ( Vitis ) roots. The aim was to determine whether NaCl affects patterns of Claccumulation differentially in the roots of a Cl --excluding genotype and a non-excluding genotype. Two regions of fibrous roots were analysed: (1) a region 2-3 mm basipetal to the root tip; and (2) a region of the root 10-12 mm basipetal to the root tip where the outermost layer is the hypodermis. The ion contents of the hypodermis, cortex, endodermis and pericycle vacuoles were analysed. Data were also collected from the cytoplasm of the endodermal and pericycle cells. The analyses showed that the ion profiles of the hypodermis and the endodermis were significantly different from those of the cortex and pericycle. The hypodermis and endodermis had higher K + + + + and lower Na + + + + and Clthan surrounding cells. Some changes due to salinity such as increased K + + + + concentrations in the hypodermis were also noted. Chloride concentrations did not differ between the genotypes in the hypodermis, across the cortex or in the endodermis, but were higher in the pericycle of the excluder in comparison with the non-excluding genotype. However, K + + + + /Na + + + + ratios of the cortex and endodermis were higher in the excluder. The pericycle cells exhibited the greatest ability to sequester Na + + + + and Clin vacuoles. Overall the data show cell-type-specific ion accumulation patterns and small but significant differences were found between genotypes. The possibility that these accumulation patterns arise from differences in uptake properties of cell types and/or result from the spatial distribution of the cell types along the competing symplastic and apoplastic ion transport pathways across the root is discussed.

show abstract

Vessel-diameter distribution in roots of grapevines (Vitis vinifera L. cv. Shiraz)

Cited by 16 publications

References 15 publications

Morphology, Biomass, and Vessel Diameter of Pigeon Pea Subjected to Water Stress

Morphology, Biomass, and Vessel Diameter of Pigeon Pea Subjected to Water Stress

Root structure and cellular chloride, sodium and potassium distribution in salinized grapevines

Root structure and cellular chloride, sodium and potassium distribution in salinized grapevines

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