THE MANY RESPONSE TYPES 



15 



«;•!• • • f If ffl 



•jzjr^^a^szL 



^ 



IfJL 



l"l"l"i"i"l"l"TM-T 



mrr 



Trlfollum subterraneua L* 

 Bos«l«s; Legumlnoaae* 



Subterraneua olover* 



In a sense, this replacement of a low temperature requirement 

 "by loDK days ia just the opposite of the Campanula Medium fespona 

 Most interesting. The authors below say that sugar beet» radish, 

 and spinach are also in this olaas, hut this Is a hj.t hard to 

 grasp. Itajbe* 



Morlejf r* H. and L. T. Erana 1959 Slower Initiation In 

 Trifolium . subterraneua I(« Australian J". Igri. Eeasarch 



10: 17-25. 



UNISOBT ANALYSIS CAUB 



eo«f«it«n9» . tene eerrrurr err. • t lustrr 



^ra 



nrrr 





T] 



fflf 



l„,.|A|.|,.|:,|..|;|..|.|.,|.|...|„)„|.. | ..|M-l-hl-l' -rF-Fn::^ 



Xanthium pennsylvanicum Wall« CocklslJur 

 Isterales; Compositae; Inbrosieao* 



An absolute, short-day plant with no low-temper atUTO requirement, jjij-* 

 Critical dark period about fijbra 20 Bin (crt day: 15 lira ^ min). |[T-# 

 Critical dark period slightly shorter at higher temperatures. 





i:^ 



^;;-<'' 



K'itv; 



^•K-t^' 



5^' 



.Plant number 103. in table (Handbook of Biological data). s(</s-si>)Tj 



See many reviews, -etc. . in intensively studied species. 



The fairly early classic; Ha m ner and Bonner 1958 Bot.G«z. 100*388 



NISORT ANALYSIS Card f^.-Y» eu..sjcMieeM=».T.oH.TcooM»«>.rDiv.-UHAourf niHTip n. u.i A. »*« ^•^.^"" 



|.|„|„|.|„|-U|.|,.|..|.|,|..| »|..|..h.) 



I " I " I 



Figure 2-1 



Two cards used in working out the response types. Notches around the 

 edge are punched according to a code which indicates the speUing of the 

 genus name at the top, the day-length and temperature responses on the 

 left, and the interactions on the right. The bottom remains unpunched 

 for future complications ! When all of the cards are placed in a stack, a 

 needle may be run through the hole which represents the response one 

 might be seeking, and when the cards are shaken, those which have been 

 punched at that number fall out. 



