
%0 Journal Article
%A Vara Prasad, Pagadala V. 
%A Craufurd, Peter Q. 
%A Kakani, Vijay G. 
%A Wheeler, Timothy R. 
%A Boote, Kenneth J. 
%T Influence of high temperature during pre- and post-anthesis stages of floral development on fruit-set and pollen germination in peanut
%J Functional Plant Biology
%D 2001/03/07
%V 28
%N 3
%P 233-240
%K anthesis, Arachis hypogaea L., fruit-set, groundnut, heat-stress, peanut, pollen, temperature.
%R https://doi.org/10.1071/PP00127
%U https://www.publish.csiro.au/paper/PP00127 
%X Peanut (Arachis hypogaea L.) crops are often exposed to day temperatures &#62; 35&#176;C for short periods duringflowering, resulting in lower yields. Research was conducted to study and quantify the effects of short episodes (1&#8211; 6 d) of high temperatures during the pre- and post-anthesis stages of floral development on fruit-set, pollen viability, germination and tube growth. Plants of peanut cv. ICGV-86015 were grown in controlled environments at 28/22&#176;C (day/night). High daytime air temperature treatments ranging from 28 (control) to 48&#176;C were imposed at different times between 6 d before anthesis (DBA) and 6 d after anthesis (DAA) for 1, 3 or 6 d. Floral buds or flowers were tagged at different stages to determine fruit-set. Exposure to bud (tissue) temperature &#x2265; 39&#176;C for 1 d significantly reduced fruit-set compared to the control at 28&#176;C, and the magnitude of the reduction varied with stage of floral development. Floral buds were most sensitive to high temperature at 4 DBA and at anthesis, coinciding with micro-sporogenesis and pollination or fertilisation, respectively. The critical bud temperature at these stages was 33&#176;C, above which fruit-set was reduced by 6% &#176;C &#8211;1 . Lower fruit-set due to high temperatures at pre-anthesis and anthesis stages were due to pollen sterility and retarded pollen tube growth, respectively. 
