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19 results on '"Abu‐Nassar, Jackline"'

4. Ambrosia grayi as a new alien causal species in Israel: plant biology and chemical management.

Author

Neta, Danielle, Abu‐Nassar, Jackline, Cafri, Daniella, Ezra, Nadav, David, Izhak, Shtein, Ilana, Goldway, Martin, Eizenberg, Hanan, and Matzrafi, Maor

Subjects
CHEMICAL biology, PHYTOCHEMICALS, INTRODUCED species, EFFECT of herbicides on plants, PEST control, CHEMICAL plants
Abstract

BACKGROUND: Ambrosia grayi is a perennial weed native to northern Mexico, which can also be found in the Great Plains of the US. Outside the Americas, A. grayi has only been documented in Israel, where it is currently categorized as a casual species at advanced eradication stages. Here, we studied the plant biology and chemical weed management options of A. grayi. RESULTS: Only large achenes of A. grayi (~5% of all achenes) contain seeds; moreover, the viability of seeds extracted from large achenes was ~25%. Examination of plant anatomy revealed that underground vegetative segments show an anatomical structure of stems (rhizomes) with anomalous secondary growth. The optimal (night/day) temperature for the emergence of A. grayi rhizomes was 20/30 °C, and the emergence rate increased under elevated temperatures. Emergence may occur at different soil moisture content (25–60%); rhizomes were able to emerge even after 1 month of drought conditions (20%, 25% and 30%). Herbicide combinations, such as fluroxypyr + glufosinate, fluroxypyr + glyphosate, and glyphosate + saflufenacil + surfactant, were tested under quarantine conditions and showed high efficacy for the control of A. grayi. However, the efficiency of these treatments was highly correlated with plant growth stage. CONCLUSION: In Israel, the spread of A. grayi occurs mainly via rhizomes that can emerge under a wide range of temperatures and soil moisture conditions. Data regarding herbicide efficacy will aid in improving the eradication efforts taken by Israel's Plant Protection and Inspection Services. © 2024 The Authors. Pest Management Science published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry. [ABSTRACT FROM AUTHOR]

Published
2024
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17. Biological activity of natural phytoecdysteroids from Ajuga iva against the sweetpotato whitefly Bemisia tabaci and the persea mite Oligonychus perseae

Author

Aly, Radi, primary, Ravid, Uzi, additional, Abu-Nassar, Jackline, additional, Botnick, Ilan, additional, Lebedev, Galina, additional, Gal, Shira, additional, Ziadna, Hammam, additional, Achdari, Guy, additional, Smirov, Evgeny, additional, Meir, Ayala, additional, and Ghanim, Murad, additional

Published
2011
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19. Gene silencing of CCD7and CCD8in Phelipanche aegyptiacaby tobacco rattle virus system retarded the parasite development on the host

Author

Aly, Radi, Dubey, Neeraj Kumar, Yahyaa, Mosaab, Abu-Nassar, Jackline, and Ibdah, Mwafaq

Abstract

Strigolactones are phytohormones that stimulate seed germination of parasitic plants including Phelipanche aegyptiaca. Strigolactones are derived from carotenoids via a pathway involving the carotenoid cleavage dioxygenases CCD7and CCD8. We report here identification of PaCCD7and PaCCD8orthologous genes from P. aegyptiaca. Expression analysis of PaCCD7and PaCCD8genes showed significant variation in their transcript levels in seeds and tubercles of P. aegyptiacaat different developmental stages. These two parasitic PaCCD7and PaCCD8genes were silenced in P. aegyptiacausing a trans-silencing approach in Nicotiana benthamiana.The transient knock-down of PaCCD7and PaCCD8inhibited tubercle development and the infestation process in host plants. Our results suggest an important role of the strigolactone associated genes (PaCCD7and PaCCD8) in the parasite life cycle.

Published
2014
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