Pollination constant

All plants pollinated by animal vectors benefit from flower-constant behavior since nectar removed by visitors not carrying conspeclflc pollen is wasted. However, rare or widely dispersed plants should be more strongly selected for adaptations that maximize pollinator constancy than should common or clumped plants (2). Perhaps in crownvetch there has been selection for constancy in flower visitors using high concentrations of NPA to exclude all but specific pollinators. 

The analyses have been performed on a number of resistant and susceptible plants, which included the parents and first and second generation self-pollinated progeny, in order to assess variability within each plant line. Previous work by Walters showed that the chemical exudate composition was held relatively constant within the resistant line, and the results presented in Table IV would support that conclusion (5. 61. 

Rubisco activity peaked immediately after pollination, declined by half until day 42 and was nil at day 74 (fig. 2a). At that time chlorophyll was totally absent. Rubisco quantity varied similariy except that the initial decline was slower since 50 % of the protein was stiii present, at day 63. The fate of Rubisco-protein was different from that of totai protein, the latter declined more rapidly but remained constant after day 74 (fig. 2b). 

Concentrations of FA species and types (palmitic, P hexadecenoic, H octadecenoic, O linoleic, L total satxuuted, S total unsaturated, U) in TAGs at 53-107 days after pollination (DAP), absolute content of separate TAGs (by lipase hydrolysis), and a constant of relative rate of TAG accumulation (k, d ) were determined as described earlier [1,2],... 

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