Effect of Temperature and Nutrients on Flower Initiation of Raphanus sativus L. in Total Darkness

In embryos and cotyledons of seeds of the radish cv. `Tetra Iłówiecka' (which needs 20 days of vernalization) and cv. 'Saxa' (which flowers without vernalization) germinating at a vernalizing temperature of 5°C, the levels of auxins, gibberellins, cytokinins and the aibscisic acid-like inhibitor were determined, The analyses were performed after 5, 10, 15, 20, 25 and 30 days of chilling. The levels of growth regulators were also determined in embryos and cotyledons of seeds germinated at 260C when in the same growth stage as the material taken from chilled seeds. Cold treatment significantly affected the level of all endogenous growth regulators in embryos and cotyledons of both varieties. However, changes in the levels of these substances were not directly connected with the vernalization process. It was found that the vernalization of seeds of 'the radish cv. `Tetra Iłówiecka' increased the level of GAs in leaves, this did not, however, coincide with flower initiation. It is concluded that the role of GAs in flowering of the studied plants is connected rather with photoinduction than with vernalization.

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Effect of temperature on the growth and antioxidative activity of Raphanus sativus L. Kaiwaredaikon (Japanese radish sprout)

Shokubutsu Kankyo Kogaku ◽

10.2525/shita.21.29 ◽

2009 ◽

Vol 21 (1) ◽

pp. 29-34 ◽

Cited By ~ 2

Author(s):

Keiko MATSUMOTO ◽

Yuichi TADA ◽

Hiroshi SHIMIZU ◽

Sakae SHIBUSAWA

Keyword(s):

Raphanus Sativus ◽

Antioxidative Activity ◽

Effect Of Temperature ◽

Japanese Radish ◽

Raphanus Sativus L

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The effect of temperature on growth and development of cultivars of radish (Raphanus sativus L. var. radicula Pers.) under summer conditions.

Netherlands Journal of Agricultural Science ◽

10.18174/njas.v26i1.17111 ◽

1978 ◽

Vol 26 (1) ◽

pp. 68-75

Author(s):

M. Nieuwhof

Keyword(s):

Root Growth ◽

Raphanus Sativus ◽

Dry Matter ◽

Cultivar Differences ◽

Effect Of Temperature ◽

Root Weight ◽

Matter Production ◽

Raphanus Sativus L ◽

Maximum Root ◽

Selection Of

During 1977, seven cultivars and strains were sown in glasshouses at temperatures of 10, 14, 17, 20, 23 and 26 deg C and harvested at five dates. Maximum leaf and dry-matter production occurred at 20 and 23 deg C, and maximum root growth initially at 20 and 23 deg C, but later at 17 deg C. Cultivar differences in rate of leaf and root growth were observed, and cultivar X environment interactions were apparent for leaf and root growth under summer conditions. The overall order of cultivars for leaf and root weight was similar to that for plants grown under autumn conditions [see PBA 47, 5915]; hence it is suggested that selection of plants for growing in winter could be performed during the summer. (Abstract retrieved from CAB Abstracts by CABI’s permission)

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