TY  - JOUR
AU  - Batak, Ivan
AU  - Skorić, Marijana
AU  - Giba, Zlatko
AU  - Grubišić, Dragoljub
AU  - Poff, KL
AU  - Konjević, Radomir M
PY  - 2002
UR  - https://radar.ibiss.bg.ac.rs/handle/123456789/1785
AB  - Nitrogenous compounds, such as potassium nitrate, potentiate germination of different species of light-requiring seeds. Using light-induced Arabidopsis thaliana seed germination as a model system, our data suggested that only phytochrome A (phyA)-specific induced germination was affected after the exogenous application of nitrates, different nitric oxide (NO)-donors (such as organic nitrates) or sodium nitroprusside. The stimulative effect was very pronounced. Treated seed samples reached maximal germination after very short periods of red-light irradiation. To a far lesser extent, these substances affected phytochrome B (phyB)-specific induced germination. In phyB-specific induced germination, potassium nitrate was most effective, but germination percentages never exceeded 50%. The least effective was sodium nitroprusside, which practically did not affect phyB-specific induced germination. These results were confirmed using corresponding phytochrome mutants.
T2  - Seed Science Research
T1  - The effects of potassium nitrate and NO-donors on phytochrome A- and phytochrome B-specific induced germination of Arabidopsis thaliana seeds
IS  - 4
VL  - 12
EP  - 259
UR  - https://hdl.handle.net/21.15107/rcub_ibiss_1785
ER  - 

@article{
author = "Batak, Ivan and Skorić, Marijana and Giba, Zlatko and Grubišić, Dragoljub and Poff, KL and Konjević, Radomir M",
year = "2002",
abstract = "Nitrogenous compounds, such as potassium nitrate, potentiate germination of different species of light-requiring seeds. Using light-induced Arabidopsis thaliana seed germination as a model system, our data suggested that only phytochrome A (phyA)-specific induced germination was affected after the exogenous application of nitrates, different nitric oxide (NO)-donors (such as organic nitrates) or sodium nitroprusside. The stimulative effect was very pronounced. Treated seed samples reached maximal germination after very short periods of red-light irradiation. To a far lesser extent, these substances affected phytochrome B (phyB)-specific induced germination. In phyB-specific induced germination, potassium nitrate was most effective, but germination percentages never exceeded 50%. The least effective was sodium nitroprusside, which practically did not affect phyB-specific induced germination. These results were confirmed using corresponding phytochrome mutants.",
journal = "Seed Science Research",
title = "The effects of potassium nitrate and NO-donors on phytochrome A- and phytochrome B-specific induced germination of Arabidopsis thaliana seeds",
number = "4",
volume = "12",
pages = "259",
url = "https://hdl.handle.net/21.15107/rcub_ibiss_1785"
}

Batak, I., Skorić, M., Giba, Z., Grubišić, D., Poff, K.,& Konjević, R. M.. (2002). The effects of potassium nitrate and NO-donors on phytochrome A- and phytochrome B-specific induced germination of Arabidopsis thaliana seeds. in Seed Science Research, 12(4).
https://hdl.handle.net/21.15107/rcub_ibiss_1785

Batak I, Skorić M, Giba Z, Grubišić D, Poff K, Konjević RM. The effects of potassium nitrate and NO-donors on phytochrome A- and phytochrome B-specific induced germination of Arabidopsis thaliana seeds. in Seed Science Research. 2002;12(4):null-259.
https://hdl.handle.net/21.15107/rcub_ibiss_1785 .

Batak, Ivan, Skorić, Marijana, Giba, Zlatko, Grubišić, Dragoljub, Poff, KL, Konjević, Radomir M, "The effects of potassium nitrate and NO-donors on phytochrome A- and phytochrome B-specific induced germination of Arabidopsis thaliana seeds" in Seed Science Research, 12, no. 4 (2002),
https://hdl.handle.net/21.15107/rcub_ibiss_1785 .

TY  - JOUR
AU  - Janoudi, AK
AU  - Konjević, Radomir M
AU  - Whitelam, G
AU  - Gordon, W
AU  - Poff, KL
PY  - 1997
UR  - https://radar.ibiss.bg.ac.rs/handle/123456789/1872
AB  - The role of phytochrome A (phyA) and phytochrome B (phyB) in phototropism was investigated by using the phytochrome-deficient mutants phyA-101, phyB-1 and a phyA/phyB double mutant. The red-light-induced enhancement of phototropism, which is normally observed in wild-type seedlings, could not be detected in the phyA/phyB mutant at fluences of red light between 0.1 and 19 000 mu mol m(-2). The loss of phyB has been shown to have no apparent effect on enhancement, while the loss of phyA resulted in a loss of enhancement only in the low fluence range (Janoudi et al. 1997). The conclusions of the aforementioned study can now be modified based on the current results which indicate that phototropic enhancement in the high fluence range is mediated by either phyA or phyB, and that other phytochromes have no role in enhancement. First positive phototropism was unaffected in phyA-101 and phyB-1. However, the magnitude of first positive phototropism in the phyA/phyB mutant was significantly lower than that of the wild-type Landsberg parent. Thus, the presence of either phyA or phyB is required for normal expression of first positive phototropism. The time threshold for second positive phototropism is unaltered in the phyA-101 and phyB-1 mutants. However, the time threshold in the phyA/phyB mutant is about 2 h, approximately six times that of the wild type. Finally, the magnitude of second positive phototropism in both phyA-101 and phyB-1 is diminished in comparison with the wild-type response. Thus, phyA and phyB, acting independently or in combination, regulate the magnitude of phototropic curvature and the time threshold for second positive phototropism. We conclude that the presence of phyA and phyB is required, but not sufficient, for the expression of normal phototropism.
T2  - Physiologia Plantarum
T1  - Both phytochrome A and phytochrome B are required for the normal expression of phototropism in Arabidopsis thaliana seedlings
IS  - 2
VL  - 101
EP  - 282
UR  - https://hdl.handle.net/21.15107/rcub_ibiss_1872
ER  - 

@article{
author = "Janoudi, AK and Konjević, Radomir M and Whitelam, G and Gordon, W and Poff, KL",
year = "1997",
abstract = "The role of phytochrome A (phyA) and phytochrome B (phyB) in phototropism was investigated by using the phytochrome-deficient mutants phyA-101, phyB-1 and a phyA/phyB double mutant. The red-light-induced enhancement of phototropism, which is normally observed in wild-type seedlings, could not be detected in the phyA/phyB mutant at fluences of red light between 0.1 and 19 000 mu mol m(-2). The loss of phyB has been shown to have no apparent effect on enhancement, while the loss of phyA resulted in a loss of enhancement only in the low fluence range (Janoudi et al. 1997). The conclusions of the aforementioned study can now be modified based on the current results which indicate that phototropic enhancement in the high fluence range is mediated by either phyA or phyB, and that other phytochromes have no role in enhancement. First positive phototropism was unaffected in phyA-101 and phyB-1. However, the magnitude of first positive phototropism in the phyA/phyB mutant was significantly lower than that of the wild-type Landsberg parent. Thus, the presence of either phyA or phyB is required for normal expression of first positive phototropism. The time threshold for second positive phototropism is unaltered in the phyA-101 and phyB-1 mutants. However, the time threshold in the phyA/phyB mutant is about 2 h, approximately six times that of the wild type. Finally, the magnitude of second positive phototropism in both phyA-101 and phyB-1 is diminished in comparison with the wild-type response. Thus, phyA and phyB, acting independently or in combination, regulate the magnitude of phototropic curvature and the time threshold for second positive phototropism. We conclude that the presence of phyA and phyB is required, but not sufficient, for the expression of normal phototropism.",
journal = "Physiologia Plantarum",
title = "Both phytochrome A and phytochrome B are required for the normal expression of phototropism in Arabidopsis thaliana seedlings",
number = "2",
volume = "101",
pages = "282",
url = "https://hdl.handle.net/21.15107/rcub_ibiss_1872"
}

Janoudi, A., Konjević, R. M., Whitelam, G., Gordon, W.,& Poff, K.. (1997). Both phytochrome A and phytochrome B are required for the normal expression of phototropism in Arabidopsis thaliana seedlings. in Physiologia Plantarum, 101(2).
https://hdl.handle.net/21.15107/rcub_ibiss_1872

Janoudi A, Konjević RM, Whitelam G, Gordon W, Poff K. Both phytochrome A and phytochrome B are required for the normal expression of phototropism in Arabidopsis thaliana seedlings. in Physiologia Plantarum. 1997;101(2):null-282.
https://hdl.handle.net/21.15107/rcub_ibiss_1872 .

Janoudi, AK, Konjević, Radomir M, Whitelam, G, Gordon, W, Poff, KL, "Both phytochrome A and phytochrome B are required for the normal expression of phototropism in Arabidopsis thaliana seedlings" in Physiologia Plantarum, 101, no. 2 (1997),
https://hdl.handle.net/21.15107/rcub_ibiss_1872 .