Moderation of physiological responses in rice plants with Azolla under 2,4-Dichlorophenoxy acetic acid stress

Effects of fluazifop-butyl {(±)-butyl 2-[4-[(5-(trifluoromethyl)-2-pyridinyl)oxy] phenoxy] propanoate} on cellular uptake and incorporation of14C-leucine,14C-uridine, and14C-thymidine into protein, RNA, and DNA, respectively, were evaluated in corn (Zea maysL.) coleoptiles and soybean [Glycine max(L.) Merr.] hypocotyls. Uptake of14C-leucine in corn coleoptiles was inhibited by fluazifop-butyl at 10-4to 10-7M, which was related to reductions in incorporation of14C-leucine into protein at 10-4to 10-6M. The effect of fluazifop-butyl on14C-leucine uptake and incorporation was reduced by 2 × 10-6M 2,4-D [(2,4-dichlorophenoxy)acetic acid], indicating antagonism between these herbicides. RNA and DNA synthesis were inhibited at 10-5and 10-4M. Protein synthesis in soybean hypocotyls was stimulated by 10-7and 10-6M fluazifop-butyl 33 and 27%, respectively, and inhibited by 10-4M 50%. RNA and DNA synthesis were also inhibited by 10-4M in soybean.

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Plant Regeneration from Excised Cotyledons of Mature Strawberry Achenes

HortScience ◽

10.21273/hortsci.25.5.569 ◽

1990 ◽

Vol 25 (5) ◽

pp. 569-571 ◽

Cited By ~ 5

Author(s):

A. Raymond Miller ◽

Craig K. Chandler

Keyword(s):

Acetic Acid ◽

Plant Regeneration ◽

Multiple Shoot ◽

Naphthaleneacetic Acid ◽

Developmental Studies ◽

Shoot Buds ◽

Cotyledon Explants ◽

Multiple Shoot Buds ◽

Rapid Regeneration ◽

Dichlorophenoxy Acetic Acid

A protocol was developed for excising and culturing cotyledon explants from mature achenes of strawberry (Fragaria × ananassa Duch.). Cotyledon explants formed callus with multiple shoot buds on agar-solidified Murashige and Skoog media containing several combinations of hormones (1 μm 2,4-D; 10 μm 2,4-D; 1 μm BA + 1 μm 2,4-D; 1 μm BA + 10 μm 2,4-D; 5 μm BA; 5 μm BA + 1 μm 2,4-D; 5 μm BA + 10 μ m 2,4-D; 5 μ m BA + 5 μm NAA; 5 μ m BA + 15 μ m NAA). After three subcultures, only tissues maintained on the medium containing 5 μm BA + 5 μm NAA continued to form shoots. Tissues transferred to other media eventually died (1 μm 2,4-D; 1 μ m BA + 10 μ m 2,4-D; 5 μ m BA; 5 μ m BA + 1 μ m 2,4-D), became unorganized (1 μm BA + 1 μm 2,4-D; 5 μm BA + 10 μm 2,4-D; 5 μm BA + 15 μm NAA), or formed roots (10 μm 2,4-D). Whole plantlets were produced by transferring callus with buds to medium lacking hormones. The rapid regeneration of clonal plantlets from cotyledon explants may be useful for reducing variability in future developmental studies. Chemical names used: N-(phenylmethyl)-1H-purin-6-amine (BA); (2,4-dichlorophenoxy) acetic acid (2,4-D); and 1-naphthaleneacetic acid (NAA).

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Cotton Resistance to 2,4‐Dichlorophenoxy Acetic Acid Spray Drift 1

Crop Science ◽

10.2135/cropsci1986.0011183x002600020034x ◽

1986 ◽

Vol 26 (2) ◽

pp. 376-377 ◽

Cited By ~ 4

Author(s):

Cecil Regier ◽

R. E. Dilbeck ◽

D. J. Undersander ◽

J. E. Quisenberry

Keyword(s):

Acetic Acid ◽

Spray Drift ◽

Dichlorophenoxy Acetic Acid

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Enhancement of Herbicide Activity with an Isoparaffinic Oil Carrier

Weed Science ◽

10.1017/s0043174500051092 ◽

1971 ◽

Vol 19 (6) ◽

pp. 701-705 ◽

Cited By ~ 8

Author(s):

R. J. Burr ◽

G. F. Warren

Keyword(s):

Acetic Acid ◽

Cyperus Rotundus ◽

Setaria Viridis ◽

Ipomoea Hederacea ◽

Purple Nutsedge ◽

Green Foxtail ◽

Herbicide Activity ◽

Dichlorophenoxy Acetic Acid ◽

Agropyron Repens

Several herbicides were tested in the greenhouse on ivyleaf morningglory (Ipomoea hederacea(L.) Jacq.), green foxtail (Setaria viridis(L.) Beauv.), purple nutsedge (Cyperus rotundusL.), and quackgrass (Agropyron repens(L.) Beauv.) to determine the degree of enhancement in activity that could be obtained with an isoparaffinic oil carrier applied at 140 L/ha. The enhancement varied with the herbicide and with the species, ranging from 16-fold enhancement with 2-chloro-4-(ethylamino)-6-(isopropylamino)-s-triazine (atrazine) and 2-sec-butyl-4,6-dinitrophenol (dinoseb) on ivyleaf morningglory to no enhancement of atrazine activity on purple nutsedge and quackgrass or (2,4-dichlorophenoxy)acetic acid (2,4-D) activity on quackgrass and ivyleaf morningglory. An oil adjuvant was less effective in enhancing dinoseb and 3-(3,4-dichlorophenyl)-1-methoxy-1-methylurea (linuron) activity than was the isoparaffinic oil carrier. Also, the isoparaffinic oil carrier emulsified in water was less effective than the undiluted oil in enhancing dinoseb activity on green foxtail, even though equal volumes of the isoparaffinic oil were applied.

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Influence of growth regulators and explants on shoot regeneration in carnation

Horticultural Science ◽

10.17221/1/2009-hortsci ◽

2009 ◽

Vol 36 (No. 4) ◽

pp. 140-146 ◽

Cited By ~ 4

Author(s):

J.K. Kanwar ◽

S. Kumar

Keyword(s):

Acetic Acid ◽

Shoot Regeneration ◽

Growth Regulators ◽

Dianthus Caryophyllus ◽

Naphthalene Acetic Acid ◽

Ms Medium ◽

Shoot Bud ◽

Dichlorophenoxy Acetic Acid ◽

Number Of Shoots

The influence of growth regulators, explants and their interactions on in vitro shoot bud formation from callus was studied in <I>Dianthus caryophyllus</I> L. The leaf and internode explants were cultured on Murashige and Skoog (MS) medium containing different concentrations of growth regulators. The highest callus induction was observed with 2 mg/l 2,4-dichlorophenoxy acetic acid (2,4-D) and 1 mg/l benzyl adenine (BA). Out of twenty seven shoot regeneration media tested, only 2 mg/l thidiazuron (TDZ) and zeatin alone or in combination with naphthalene acetic acid (NAA) and/or indole acetic acid (IAA) could differentiate calli. The highest average number of shoots was observed with 2 mg/l TDZ and 1 mg/l IAA. Significant differences were observed in calli producing shoots and number of shoots per callus in the explants of leaf and internode. The shoots were elongated and multiplied on MS medium supplemented with 1 mg/l BA and solidified with 1% agar. The shoots were rooted and hardened with 76% survival success in pots after six weeks of transfer to the pots.

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