Studies on symbiotic nitrogen fixation by a new strain of tetraploid red clover (UO36)

Nodulating behaviour of colchicine induced polyploids of Phaseolus aureus Roxb.

“…Similar results were also obtained in case of clovers and Lucerne ( Nilsson and Rydin 1954, Weir 1961a, Nutman 1967. However, the behaviour of polyploids with regard to their nodular volumes was found to be opposite, probably because of the difference in the average size of the nodules exhibited by the diploid, triploid and tetraploid P. aureus.…”

“…Studies on nodulation in a number of polyploid legumes have been made by different workers (Oinuma 1952, Bhaskaran and Swaminathan 1954, Nilsson and Rydin 1954, Nutman 1961, 1967, Weir 1961a, Diatloff and Ferguson 1970. In most of the cases, however, nodulation was found to have been decreased in tetraploids as compared to that of their corresponding diploids.…”

The direct effects of plant polyploidy on the legume–rhizobia mutualism

“…While plant polyploidy might not directly and consistently reduce time to nodulation, these results might also reflect variation in experimental approach across the studies (Supplementary Data Table S1). Moreover, five of the nine studies either did not conduct statistical analyses or only report anecdotally that diploids and tetraploids differ in time to nodulation (Nilsson and Rydin, 1954;Hely, 1957;Weir, 1961b;Evans and Jones, 1966;Diatloff and Ferguson, 1970).…”