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The Relation Of Some Rusts To The Physiology Of Their Hosts (1917) (Paperback)
Loot Price: R492
Discovery Miles 4 920
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The Relation Of Some Rusts To The Physiology Of Their Hosts (1917) (Paperback)
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Loot Price R492
Discovery Miles 4 920
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for free. This is an OCR edition with typos. Excerpt from book:
others were kept in the dark for various periods of time and were
then brought into the light. Table III Effect of Light Upon the
Development of Puccinia Coronata. Comparison of Plants Inoculated
in Light and in Darkness Pot No.Time in LightTime in Darkad Period
Time in LightIncubation PeriodRetardationC 17.10I diy4 days6 da 6
'ysII days: tion ys2 daysC 17.20. . . .I I4]: T' II2 "C 17.21 no
infec C 17.225 5 5 9 9 9 C 17 21 3 ' 3 14 da '4 9 9 95 " 5 'C
17.24. 6 ' C 17. 25 C 17.26 C 17 27 C 17 28 5 1 7 8 8 .6 12 3 " C
17 20 9 9 11 no infe 9 da C 17. 10 . 1 5 C 17.11.. 2 " C'7-32 20 +:
tion ys c 17.33 I 8 7 C 17.34 C 17-35 C 17-36 5 11 12 21 12 3 " 10
i I12 " 5 7 3 "Following this experiment, plants were inoculated in
areas marked with India ink and covered with dark cylinders. After
two days, the inoculated areas were sectioned and the sections
treated with chloral hydrate and iodine. Mycelium was found in some
of the inoculated areas, but had not developed to a very great
extent. From these results it is evident that infection of Avena
sativa by Puccinia coronala takes place in darkness as well as in
light, although apparently the amount of infection is less in
darkness. Puccinia Sorghi The first experiments upon the effect of
light upon the development of Puccinia Sorghi were carried out in
the same manner as with Puccinia coronata. The results obtained in
these first experiments (Experiments 12-19) were not as clear cut
as those obtained with the latter. Seven out of eleven plants which
were in the dark three to eight days before being placed in the
light had their incubation period lengthened one to two days. The
other four had no retardation of their incubation period Four out
of thirteen plants which were...
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