APPENDIX 215 



Hj 41. Absolute short quantitative long-day plants which require low 

 temperature 



Poa pro tens is, Peterson, Maurice L. and Kentucky bluegrass, 

 Loomis, W. E., 1948. Plant Physiol. variety 2 



24: 31-43 



-'3' 42. Quantitative long-short-day plants; no direct temperature effect. 



Chrysanthemum ssp., C. 214 Variety 7 



-'i|) 43. Quantitative long-short-day plants; no direct temperature effect; long- 

 day effect quantitatively replaced by low temperature. 



Chrysanthemum spp., C. 214 Variety 9 



-© 44. Intermediate-day plants; no direct temperature effect. Sugar cane is 

 now thought by many researchers to be a short-day plant instead of an 

 intermediate-day plant. 



Chenopodium album. Fig. 3-8 Pigweed varieties 



Tephrosia Candida, H. 101 Hoary pea 



Saccharum officinarum, H. 48 Sugar cane, 



var. 28NG 292 



''^y 45. Plants quantitatively inhibited by intermediate day lengths, no direct 

 effect of temperature. The discoverers of this interesting response call it 

 ambiphotoperiodism. 



Madia elegans, C. Ch. Mathon et M. 

 Stroun. Con.-Troisieme Congress 

 International de Photobiologie, 1960, 

 Copenhagen. 



\) 46. Short-long-day plants; no direct temperature effect; short-day replaced 

 by low temperature. Chouard calls the replacement of short-day require- 

 ment by low temperatures "Wellensiek's Phenomenon", after its discoverer. 

 Chouard (personal communication) says a dozen or more other species 

 are now known for this category. He also mentioned the interesting 

 discoveries that one variety of Scabiosa pratensis requires either low 

 temperature or short days, after which it is completely day-neutral, and 

 that several strains of Lolium perenne require short days, chilling, and 

 long days in that order, with no apparent replacement or interactions. 

 Campanula medium, C. 201, 218 Canterbury bells 



iC) 47. Short-long-day plants; low temperature required. 



Dactylis glomerata, H. 37, C. 211. Orchard grass 



Gardner, F. P. and Loomis, W. E., 

 1953, Plant Physiol. 28: 201-217 



- 3 48. Long-short-day plants; no direct temperature effect. 



Bryophyllum daigremontianum, Resende, 



F., 1952. Portugaliae Acat. Biologica. 



Series A-III: 318-322. 

 Cestrum nocturnum, Sachs, R. M., 1956. Night-blooming jasmine. 



Plant Physiol. 31:430-433. 



