CHANGES IN CONTENTS OF STOMATA. 



99 



Table 48. — Changes in contents 0} guard-cells and of pore — Continued. 



Time. 



July 7, i2 h oo m day. 



1 30 p. m. 



2 10 p. m, 

 4 3o p. m, 



4 45 P- m. 



5 30 p. m, 



July 8, 4 45 a. m 



6 30 a. m 



7 30 a. m 



00 a. m 



9 30 a. m. 



1 30 p. m 



4 30 p. m 



5 00 p. m 



July 10, 3 00 a. m, 



4 00 a. m. 



5 30 a. m. 

 7 50 a. m. 



8 20 a. m, 



9 00 a. m. 



Starch content of- 



Guard-cells. 



Minute granules in 

 plastids. 



Just visible as black 

 granules. 



Marked increase. 



Still further and 

 considerable in- 

 crease. Plastids 

 large and dense- 

 ly granular 

 (starch). 



Abundant ; plastids 

 irregular inform 

 on account of 

 size of starch 

 granules. 



Deep color reac- 

 tion with KI-f-I; 

 plastids ap- 

 pressed to walls. 



Fairly abundant, 

 but granules 

 small. 



Scanty. 



Abundant plastids 

 large and irreg- 

 ular. 



Present 



..do 



Abundant 



Small amount; 

 light iodine reac- 

 tion. 



Absent ; a few scat- 

 tered granules. 



Increasing in 

 amount ; plastids 

 small with mi- 

 nute, evenly dis- 

 tributed starch 

 granules. 



Chlorenchyma. 



Very abun- 

 dant. 



. do .- . 



.do. 

 .do. 



Very abun- 

 dant. 



No reaction . 



Abundant 



None 



. .do 



. .do. . 



Beginning to 

 appear as 

 small gran- 

 ules. 



Plentiful . . . 



Oil content of 

 guard-cells. 



X-body in 

 every guard - 

 cell. 



None. 



Minute gran- 

 ules. 



Large . 

 . .do. . 



Large ;several 

 additional 

 small gran- 

 ules. 



Absent. 



Minute gran- 

 ules; a few 

 large drops. 



Present .... 



Size of pore. 



Micra. 

 5 . 6 to 8 . 4 



2 to 4 



2 . 8 to 7 



((2.8) 



- 5 . 5 to 8 . 4 



((11. 2) 



2.8to5.5 

 o to 3 



o to 3 

 3 to 6 

 6 to 9 



6 to 10.5 



3 to 9 + 

 (16) 



