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Diurnal Changes in Cotton Leaf and Petiole Moisture Content as Related to Environmental Moisture Stress 1
Author(s) -
Longenecker D. E.,
Lyerly P. J.
Publication year - 1971
Publication title -
agronomy journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.752
H-Index - 131
eISSN - 1435-0645
pISSN - 0002-1962
DOI - 10.2134/agronj1971.00021962006300060018x
Subject(s) - petiole (insect anatomy) , moisture stress , water content , moisture , diurnal temperature variation , irrigation , agronomy , gossypium hirsutum , gossypium , fiber crop , malvaceae , horticulture , botany , biology , chemistry , geography , geotechnical engineering , organic chemistry , meteorology , engineering , hymenoptera
Continuation of gravimetric moisture content studies of topmost mature upland ( Gossypium hirsutum L.) and American Pima ( Gossypium barbadense L.) cotton leaves and petioles is reported. Diurnal moisture percentages of four varieties at 3 hours (7 to 8 AM, 1 to 2 PM, and 6 to 7 PM) during the day, and at 4, 11, 18, 25, and 32 days after irrigation are given. Results indicate that diurnal fluctuations in petiole moisture are less than those of leaves. Petiole moisture appears strongly related to the internal moisture stress conditions of the plant, both diurnally and with increasing environmental moisture stress. Ranges of moisture variation for leaves and petioles are shown to be similar. Previous findings that fresh weight petiole moisture percentages were continuously higher than those of attached leaves are substantiated.