. Contributions from the Botanical Laboratory and the Morris Arboretum of the University of Pennsylvania, vol. 13. Botany; Botany. July, 1936] Til.' lOllowiinr Fijr. 1-13. All |i-nn> icpioenr uiKliffcvnlial*-.! rr\\ xanon> ,,l tn-a .....nK. fiu. 9 13 >how ih,. inmiros of Houin s 1 (VIN" from nonu .1 root tip mcmn ,n«- J- M K(^. 8. M CaCL. 9. (VIls ( lip ?'"''';V"n''V ;',''â ;â ^'"'' ^'^^'^ "* Jiouin ...-F,g. 10. M 11. M 12. M KCl it o â â¦Â» â¢/.
. Contributions from the Botanical Laboratory and the Morris Arboretum of the University of Pennsylvania, vol. 13. Botany; Botany. July, 1936] Til.' lOllowiinr Fijr. 1-13. All |i-nn> icpioenr uiKliffcvnlial*-.! rr\\ xanon> ,,l tn-a .....nK. fiu. 9 13 >how ih,. inmiros of Houin s 1 (VIN" from nonu .1 root tip mcmn ,n«- J- M K(^. 8. M CaCL. 9. (VIls ( lip ?'"''';V"n''V ;',''â ;â ^'"'' ^'^^'^ "* Jiouin ...-F,g. 10. M 11. M 12. M KCl it o â â¦Â» â¢/.⺠1 EDWARDSâCVTOLOCIC AL STL DIKS OF TOXICITY 1. Siittntiiiii/ of tin ( IJiels of (Jic fu idral >i<ilts on rarioiis jxirls of IIk c( ll.'i 4S7 Cell Cytoplasm V-ic'U()l(\s Chromatin Pro])ha.'^(\s Mctaphascs Anajihascs Tt'loplia.'-ics Spindles Coil plates Nucleoli Mitochondri; M 10 ('(; D CG F F F F A N X P KC'l M M 30 50 (x; X 1) ex X X X X X X X X X p X X X X X X p M_ 100 X X X X X X X X X X V XaCl M M M M M M M M C\iCL. M M M M 10 30 50 100 10 30 50 100 10 30 100 c\s D C(\ V A A A A X N P 1) (;x X X X X X X N P X J)X X X F F F F X X P X X X X X X X X X X p cs 1) ('(; V A A A A A X A CS I) ex X X X X X X X p cs 1)X X \ X X X V X X X X X X X X X X X X p " X. normal; I), (li.(l; C. clumped; (1. 31) for calcium-starved roots. A of tlie cells are ])racticall> devoid of cyt()i)lasni, while tlie re- mainder show larjie clear s])aces, not ty])ical of true vacuoles (lis;. 10, 11). In strikin": to this condition is the ima'ze obtained followini: treatment with M CaCL. (finii)h is dissolved, leaving a clear halo about the well-fixed micleoli. The resting chromatin is fixed as granules of various sizes, generally in the i)eripheral region of the nucleus. Division figures are abundant and show normal sj)indle fibers and cell i) Only the more concentrated salt solutions cause noticeable to the rest
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