Reproductive allocation changes from Saussurea parviflora in eastern edge of Qinghai-Tibet Plateau at various altitudes during flowering

Abstract:

To study the effect of elevation on the reproductive allocation of Saussurea parviflora during the flowering，sampling survey method and weighting after dried method are chosen so as to study Saussurea parviflora 's morphological features at various altitudes.It show that, firstly,during flowering,above-ground biomass in plant itself and its organs related to reproduction and vegetation has an obvious trend of decreasing as altitude goes up.Besides,its number and stem length also slope down little by little.On the contrary,tubuliflorous biomass and reproductive allocation take on a relative trend of increasing and prosperity.Secondly,a shift phenomenon in balance from tubuliflorous biomass and its number would probably be formed.Thirdly,in flowering,biomass in many aspects and reproductive allocation are potentially controlled by the environmental factor,altitude .Finally ,for the external resource is limited ,in order to relatively promote its productive growth ,this kind of smart plant weaken the vegetation growth by quietly inhibiting its individual size .In this way, Saussurea parviflora’s breeding success rate is greatly and amazingly lifted .