HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Abstract Full Text Free Full Text (PDF) Free Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Similar articles in Web of Science Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Web of Science (7) Citing Articles via Google Scholar Google Scholar Articles by Zhang, L. Articles by Hesketh, J. D. Search for Related Content PubMed Articles by Zhang, L. Articles by Hesketh, J. D. Agricola Articles by Zhang, L. Articles by Hesketh, J. D. Related Collections Soybean Crop Growth and Development Plant and Environment Interactions Crop Ecology

Effects of Photoperiod on Growth and Development of Soybean Floral Bud in Different Maturity

^a Delta Res. and Ext. Cent., Mississippi State Univ., P.O. Box 197, Stoneville, MS 38776
^b Dep. of Agron., Beijing Agric. Univ., Beijing, China
^c Dep. of Crop Sci., Univ. of Illinois, Urbana, IL 61801 and USDA-ARS, 1201 W. Goodwin Ave., Urbana, IL 61801

View larger version (23K): [in a new window]   Fig. 1. Effect of planting date on floral bud development in soybean strains differing in maturity. P1–P5 indicate planting groups. Vertical dash lines indicate emergence dates. Horizontal dash lines indicate the time of floral bud growing period from emergence to open flowers on 50% of plants in a field plot. Roman numerals represent maturity groups (MGs). The curved dot line shows photoperiod changes during the growing season. Numbers in parentheses represent average photoperiod experienced during floral bud growth.

View larger version (30K): [in a new window]   Fig. 2. Growing degree days (GDD) required from emergence (VE) to floral bud initiation (FBI) and floral bud development (FBD) for soybean strains differing in maturity group (MG) and growing under different photoperiods encountered during the growing season at Urbana, IL.

View larger version (43K): [in a new window]   Fig. 3. Summary of the effect of timing of the photoperiod treatment on floral bud growth in Clark near-isolines L63-3117 (MG-II) and Clark L65-3366 (MG-V). All plants were under 12 h before treatments started on the day floral buds were initiated, or for L65-3366, 8 d after floral bud initiation (FBI).