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 Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via Google Scholar Google Scholar Articles by Salem, M. A. Articles by Reddy, K. R. Search for Related Content PubMed Articles by Salem, M. A. Articles by Reddy, K. R. Agricola Articles by Salem, M. A. Articles by Reddy, K. R. Related Collections Crop Growth and Development Crop Physiology & Metabolism Crop Ecology

Pollen-Based Screening of Soybean Genotypes for High Temperatures

^a Dep. of Plant and Soil Sciences, 117 Dorman Hall, Box 9555, Mississippi State Univ., Mississippi State, MS 39762
^b Dep. of Agronomy, Univ. of Florida, Gainesville, FL 32611

View larger version (20K): [in this window] [in a new window]   Fig. 1. Typical in vitro (A) pollen germination and (B) pollen tube length responses to temperature along with the fitted quadratic and modified bilinear lines, respectively, of four soybean genotypes (DP 5110, Hutcheson, DK5366RR, and HBK 5620RR). The symbols are recorded germination percentages and pollen tube lengths after 24 h and the lines (solid, DP 5110; long dash, Hutcheson; short dash, DK 5366RR; dots, HBK 5620RR) are predicted values by the respective fitted equations.

View larger version (18K): [in this window] [in a new window]   Fig. 2. Relationship between (A) minimum (Tmin) and optimum (Topt) and maximum (Tmax) temperatures, and (B) Topt and Tmax for pollen germination of 44 soybean genotypes.

View larger version (25K): [in this window] [in a new window]   Fig. 3. Response of mean (A) pollen germination and (B) pollen tube length to temperature of sensitive, intermediate, and tolerant groups of soybean genotypes based on cumulative temperature response index (CTRI).

View larger version (128K): [in this window] [in a new window]   Fig. 4. Scanning electron microscopic images of pollen grains from pollen of three soybean genotypes, sensitive (Stalwart III, A and B), intermediate (PI 471938, C and D), and tolerant (DG 5630RR, E and F) at optimal temperature of 30/22°C (A, C, and E) and supraoptimal temperature of 38/30°C (B, D, and F). The white line in each picture is 20.00 µm in length.

View larger version (128K): [in this window] [in a new window]   Fig. 5. Scanning electron microscopic images of pollen grains surface from pollen of three soybean genotypes, sensitive- Stalwart III (A and B), intermediate- PI 471938 (C and D) and tolerant- DG 5630RR (E and F) at optimal temperature of 30/22°C (A, C and E) and supraoptimal temperature of 38/30°C (B, D and F). The white line in each picture is 2.00 µm in length.