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. 2017 May 19;8:744. doi: 10.3389/fpls.2017.00744

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Copyright © 2017 Sita, Sehgal, Kumar, Kumar, Singh, Siddique and Nayyar.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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SEM observations under normal (NS) and late-sown (LS) environment on reproductive components in lentil genotypes. Pollen morphology in (a,b) NS and (c,d) LS plants. Anther morphology in (e,f) NS and (g,h) LS plants. Note damage to (d) pollen morphology and (h) anther morphology in LS heat-sensitive genotypes. Fluorescent microscopic studies showing the effects of heat stress on pollen load, pollen tube growth (marked as arrows) in the stylar region and ovular region in (i,j) NS and (k,l) LS plants. Note the (l) lack of pollen tube growth in the stylar region of LS heat sensitive genotypes compared with (k) heat-tolerant genotypes.