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פותח על ידי קלירמאש פתרונות בע"מ -
Effects of bleaching herbicides on field dodder (Cuscuta campestris)
Year:
2003
Source of publication :
Weed Science
Authors :
לאלזר, אברהם
;
.
Volume :
51
Co-Authors:
Weinberg, T., Department of Field Crops, Vegetables and Genetics, Institute of Plant Sciences and Genetics, Hebrew University of Jerusalem, Rehovot 76100, Israel, Department of Environmental Biology, University of Guelph, Guelph, Ont. N1G 2W1, Canada
Lalazar, A., Agricultural Research Organization, Institute of Field and Garden Crops, Bet-Dagan 52500, Israel
Rubin, B., Department of Field Crops, Vegetables and Genetics, Institute of Plant Sciences and Genetics, Hebrew University of Jerusalem, Rehovot 76100, Israel
Facilitators :
From page:
663
To page:
670
(
Total pages:
8
)
Abstract:
The effects of three postemergence herbicides that inhibit carotenoid biosynthesis were tested on field dodder. Flurochloridone, sulcotrione, and mesotrione treatments led to bleaching symptoms in field dodder stems. The effect of flurochloridone was rapid; 2 d after treatment (DAT) the stem was bleached and contained only 2% β-carotene, with a massive accumulation of phytoene in comparison with the control. However, flurochloridone treatment did not inhibit stem elongation, and full recovery of pigment composition at newly elongated stems was recorded 6 DAT. The effects of sulcotrione and mesotrione were similar, but the recovery was slower than with flurochloridone. The developing stems were fully bleached 6 DAT, with no detectable δ-carotene, and subsequently no recovery was observed. All three herbicides led to mass destruction of the plastids in the parenchyma cells of the cortex and pith tissue. This disruption of the plastids was associated with depletion in starch content. Sulcotrione and mesotrione treatments reduced field dodder biomass accumulation, whereas flurochloridone delayed biomass accumulation by 6 d only. The differences in phytotoxicity between flurochloridone, sulcotrione, and mesotrione might be due to their different translocation patterns. Flurochloridone is xylem-mobile and is therefore localized at the applied area because of the low transpiration rate of field dodder. Sulcotrione and mesotrione are phloem-mobile and tend to accumulate in sinks such as the primordial tissue. The massive destruction of the amyloplasts and the rapid decline in starch content in response to all the herbicide treatments may indicate the possible involvement of carotenoids in stabilizing the amyloplast outer membrane in field dodder.
Note:
Related Files :
accumulation
carotenoids
Cuscuta
Cuscuta campestris
inhibition
Phytoene
Phytotoxicity
Starch
transpiration
β-Carotene
עוד תגיות
תוכן קשור
More details
DOI :
10.1614/P2002-106
Article number:
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
31489
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 01:03
Scientific Publication
Effects of bleaching herbicides on field dodder (Cuscuta campestris)
51
Weinberg, T., Department of Field Crops, Vegetables and Genetics, Institute of Plant Sciences and Genetics, Hebrew University of Jerusalem, Rehovot 76100, Israel, Department of Environmental Biology, University of Guelph, Guelph, Ont. N1G 2W1, Canada
Lalazar, A., Agricultural Research Organization, Institute of Field and Garden Crops, Bet-Dagan 52500, Israel
Rubin, B., Department of Field Crops, Vegetables and Genetics, Institute of Plant Sciences and Genetics, Hebrew University of Jerusalem, Rehovot 76100, Israel
Effects of bleaching herbicides on field dodder (Cuscuta campestris)
The effects of three postemergence herbicides that inhibit carotenoid biosynthesis were tested on field dodder. Flurochloridone, sulcotrione, and mesotrione treatments led to bleaching symptoms in field dodder stems. The effect of flurochloridone was rapid; 2 d after treatment (DAT) the stem was bleached and contained only 2% β-carotene, with a massive accumulation of phytoene in comparison with the control. However, flurochloridone treatment did not inhibit stem elongation, and full recovery of pigment composition at newly elongated stems was recorded 6 DAT. The effects of sulcotrione and mesotrione were similar, but the recovery was slower than with flurochloridone. The developing stems were fully bleached 6 DAT, with no detectable δ-carotene, and subsequently no recovery was observed. All three herbicides led to mass destruction of the plastids in the parenchyma cells of the cortex and pith tissue. This disruption of the plastids was associated with depletion in starch content. Sulcotrione and mesotrione treatments reduced field dodder biomass accumulation, whereas flurochloridone delayed biomass accumulation by 6 d only. The differences in phytotoxicity between flurochloridone, sulcotrione, and mesotrione might be due to their different translocation patterns. Flurochloridone is xylem-mobile and is therefore localized at the applied area because of the low transpiration rate of field dodder. Sulcotrione and mesotrione are phloem-mobile and tend to accumulate in sinks such as the primordial tissue. The massive destruction of the amyloplasts and the rapid decline in starch content in response to all the herbicide treatments may indicate the possible involvement of carotenoids in stabilizing the amyloplast outer membrane in field dodder.
Scientific Publication
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