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Stage Sensitivity of Mungbean ( Vigna radiata L. Wilczek) to an Elevated Level of Carbon Dioxide
Author(s) -
Das M.,
Zaidi P. H.,
Pal M.,
Sengupta U. K.
Publication year - 2002
Publication title -
journal of agronomy and crop science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.095
H-Index - 74
eISSN - 1439-037X
pISSN - 0931-2250
DOI - 10.1046/j.1439-037x.2002.00556.x
Subject(s) - vigna , radiata , photosynthesis , carbon dioxide , germination , crop , agronomy , zoology , biology , relative growth rate , horticulture , growth rate , chemistry , botany , mathematics , ecology , geometry
An experiment was undertaken using open‐top chambers to study the effect of CO 2 enrichment on crop growth and to assess the variation related to the time of CO 2 exposure. In general, enriched CO 2 conditions (600 ± 50 p.p.m.) in the chamber positively affected the growth and development of mungbean ( Vigna radiata ), a short‐duration (60–65 days) summer pulse crop. However, there was significant variability in the effect of the crop stage/time of CO 2 exposure. It was observed that high CO 2 exposure at an early growth stage [0–20 days after germination (DAG)] had a larger effect than that at a later growth stage (21–40 DAG). The experiment also provided a means of assessing the short‐ and long‐term effects of elevated CO 2 on the carbon exchange rate at both stages of exposure. The study revealed that the sensitivity of plants to high CO 2 was more pronounced with respect to net photosynthetic rate. The overall photosynthetic activity gave greater growth and development of plants under high CO 2 .