Seed Dormancy in Red Rice (Oryza sativa) (IX. Embryo Fructose-2,6-Bisphosphate during Dormancy Breaking and Subsequent Germination)

Dormant, dehulled red rice (Oryza sativa L. ‘Louisiana strawhulled′) germinated 80 to 90% at 30 C upon exposure to 10-3 M kinetin (6-furfurylaminopurine), benzyladenine (6-benzylaminopurine), or isopentenyladenine [6-(3-methylbut-2-enylamino)purine] at pH 3.5. Zeatin [6-(4-hydroxy-3-methylbut-trans-2-enylamino)purine] was also active, eliciting 45% germination at 10-3 M. Adenine was inactive at concentrations as high as 10-2 M. There was little influence of light and no effect of initial pH of the medium upon cytokinin-stimulated germination. At 20 C the response to cytokinins was reduced, but germination of non-dormant seeds was not prevented. At 30 C, the germination of dehulled red rice with 10-3 M kinetin occurred rapidly, with almost 70% germination after 2 days. When dehulled seeds were incubated in water and then transferred to kinetin, percent germination decreased as the duration of water incubation increased. The loss of cytokinin response did not parallel the timecourse of imbibition. Cytokinins did not break dormancy of intact seeds. The hull appeared to limit kinetin uptake and inhibited germination even when kinetin was forced into intact seeds by vacuum infiltration. Dry-after-ripening of intact seeds at 30 C did not increase the kinetin-sensitivity of intact red rice.

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Seed dormancy in red rice. X. A 13C-NMR study of the metabolism of dormancy-breaking chemicals

Physiologia Plantarum ◽

10.1111/j.1399-3054.1995.tb00982.x ◽

1995 ◽

Vol 94 (4) ◽

pp. 667-671 ◽

Cited By ~ 8

Author(s):

Steven Footitt ◽

David Vargas ◽

Marc Alan Cohn

Keyword(s):

Seed Dormancy ◽

13C Nmr ◽

Red Rice ◽

Dormancy Breaking ◽

Nmr Study

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Seed dormancy in red rice. X. A 13C-NMR study of the metabolism of dormancy-breaking chemicals

Physiologia Plantarum ◽

10.1034/j.1399-3054.1995.940418.x ◽

1995 ◽

Vol 94 (4) ◽

pp. 667-671

Author(s):

Steven Footitt ◽

David Vargas ◽

Marc Alan Cohn

Keyword(s):

Seed Dormancy ◽

13C Nmr ◽

Red Rice ◽

Dormancy Breaking ◽

Nmr Study

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Seed Dormancy in Red Rice (Oryza sativa) I. Effect of Temperature on Dry-Afterripening

Weed Science ◽

10.1017/s0043174500039898 ◽

1981 ◽

Vol 29 (4) ◽

pp. 402-404 ◽

Cited By ~ 46

Author(s):

Marc A. Cohn ◽

J. A. Hughes

Keyword(s):

Oryza Sativa ◽

Seed Dormancy ◽

Exposure Time ◽

Storage Temperature ◽

Effect Of Temperature ◽

Red Rice ◽

Seed Moisture Content ◽

Dry Storage ◽

C Storage ◽

Seed Moisture

The effect of postharvest storage temperature (–15, 5, 20, and 30 C) on seed dormancy of red rice [Oryza sativa L. ‘strawhulled (SH)’], an annual species, was studied. Intact and dehulled (by hand) seeds were dormant at harvest. Intact seeds were nondormant (greater than 90% germination at 30 C) after dry storage at 20 or 30 C for 4 weeks after harvest. In intact seeds stored dry at 5 C, the degree of dormancy was dependent upon postharvest exposure time at 20 C prior to storage. Dormancy of intact seeds decreased at 5 C as this initial postharvest exposure to 20 C was increased from 2 to 7 days. This effect of initial 20 C exposure was independent of seed moisture content (11 to 12%). After dry storage of intact seeds at 5 C, dehulling promoted germination. Germination of such dehulled seeds increased with increasing storage time at 5 C up to 11 months when complete germination occurred. The response of seeds dehulled immediately after dry storage at 5 C was independent of prior exposure time (2 to 7 days) at 20 C. Storage at −15 C prevented all forms of dry-afterripening for 1 yr.

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Seed dormancy in red rice (Oryza sativa). XI. Commercial liquid smoke elicits germination

Seed Science Research ◽

10.1017/s0960258500000465 ◽

2000 ◽

Vol 10 (4) ◽

pp. 415-421 ◽

Cited By ~ 40

Author(s):

Lucia C. Doherty ◽

Marc Alan Cohn

Keyword(s):

Oryza Sativa ◽

Ph Value ◽

Maximum Activity ◽

Rice Seed ◽

Red Rice ◽

Dormancy Breaking ◽

Liquid Smoke ◽

Increased Sensitivity ◽

A Minor ◽

Water Rinsing

AbstractA commercial liquid smoke (LS) flavoring product (Reese Hickory brand) in aqueous dilutions of 4–5% (v/v) broke dormancy (40–100% germination) of both intact and dehulled red rice (Oryza sativa). To elicit this response in intact grains, the glumes had to be pricked with a dissecting needle following contact with LS and water rinsing. Germination percentages rose with increasing contact time (up to 7 d), and grains first imbibed with water before transfer to LS showed similar germination percentages as those first incubated with LS before transfer to water. LS dilutions were highly acidic (about pH 3). Dormancy-breaking activity of LS was pH-dependent and was reduced at pH values of 5–7. Buffer controls remained dormant irrespective of pH value. Maximum activity varied primarily among different bottles of LS and only to a minor extent between red rice seed lots. Dry-afterripening at 30°C for up to 14 d increased the sensitivity of unpricked, intact grains to LS compared with water controls. LS concentrations that broke dormancy of intact grains partially inhibited germination of nondormant, fully afterripened grains. Storing grains in containers of flooded soil increased sensitivity to both LS and pricking. Nitrite levels in LS were negligible and insufficient to account for the bioactivity of LS.

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Acquisition of seed dormancy breaking in rice (Oryza sativa L.) via CRISPR/Cas9-targeted mutagenesis of OsVP1 gene

Plant Biotechnology Reports ◽

10.1007/s11816-019-00580-x ◽

2019 ◽

Vol 13 (5) ◽

pp. 511-520 ◽

Cited By ~ 4

Author(s):

Yu Jin Jung ◽

Hyo Ju Lee ◽

Sangsu Bae ◽

Jong Hee Kim ◽

Dong Hyen Kim ◽

...

Keyword(s):

Oryza Sativa ◽

Seed Dormancy ◽

Oryza Sativa L ◽

Targeted Mutagenesis ◽

Dormancy Breaking

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Genetic Dissection of Seed Dormancy in Rice (Oryza sativa L.) by Using Two Mapping Populations Derived from Common Parents

Rice ◽

10.1186/s12284-020-00413-4 ◽

2020 ◽

Vol 13 (1) ◽

Author(s):

Chaopu Zhang ◽

Zhiyang Yuan ◽

Yuntong Wang ◽

Wenqiang Sun ◽

Xinxin Tang ◽

...

Keyword(s):

Oryza Sativa ◽

Seed Dormancy ◽

Oryza Sativa L ◽

Genetic Dissection ◽

Mapping Populations

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Performance of the agronomic traits of six advanced promising lines of red rice (oryza sativa l.) grown on the paddy field

IOP Conference Series Earth and Environmental Science ◽

10.1088/1755-1315/681/1/012033 ◽

2021 ◽

Vol 681 (1) ◽

pp. 012033

Author(s):

G R Sadimantara ◽

E Febrianti ◽

LO Afa ◽

S Leomo ◽

Muhidin ◽

...

Keyword(s):

Oryza Sativa ◽

Paddy Field ◽

Agronomic Traits ◽

Oryza Sativa L ◽

Red Rice

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Red Rice (Oryza sativa) Control in Drill-Seeded Rice (O. sativa)

Weed Science ◽

10.1017/s0043174500083120 ◽

1985 ◽

Vol 33 (5) ◽

pp. 703-707 ◽

Cited By ~ 8

Author(s):

Amadou Diarra ◽

Roy J. Smith ◽

Ronald E. Talbert

Keyword(s):

Oryza Sativa ◽

Grain Yield ◽

Field Experiments ◽

Growing Season ◽

Rice Cultivar ◽

Rice Grain ◽

Rice Seed ◽

Red Rice ◽

Culm Density ◽

High Yields

Field experiments were conducted to investigate methods of controlling red rice (Oryza sativaL. ♯ ORYSA) in drill-seeded rice (O. sativa). Treatments included the rice cultivar ‘Mars', coated with calcium peroxide (CaO2) at 40% (w/w) and a crop protectant, R-33865 (O,O-diethyl-O-phenyl phosphorothioate) at 0.5 and 1% (v/w). Molinate (S-ethyl hexahydro-1H-azepine-1-carbothioate) at 6.7 kg ai/ha was applied preplant incorporated (ppi). The land was flooded (2.5 to 5 cm deep) after seeding with rice (100 kg/ha, 2.5 cm deep), and the water was maintained throughout the growing season. CaO2, with or without molinate, increased rice grain yield 50% and increased rice culm density fivefold above untreated rice. Molinate applied ppi controlled 96% of the red rice. Rice seed coated with only CaO2or with CaO2plus R-33865 at 0.5%, each combined with ppi molinate, produced 5690 and 6030 kg/ha of grain, respectively. These high yields were associated with red rice control by molinate and good stands of rice provided by O2supplied by CaO2. R-33865 applied to rice seed at 1% (v/w) injured rice by reducing rice culm densities 41%, compared with rice without protectant.

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Red Rice (Oryza sativa) Status after 5 Years of Imidazolinone-Resistant Rice Technology in Arkansas

Weed Technology ◽

10.1614/wt-07-075.1 ◽

2008 ◽

Vol 22 (1) ◽

pp. 200-208 ◽

Cited By ~ 86

Author(s):

Nilda R. Burgos ◽

Jason K. Norsworthy ◽

Robert C. Scott ◽

Kenneth L. Smith

Keyword(s):

Oryza Sativa ◽

Red Rice

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