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Genotypic Variation in Epidermal Conductance and its Associated Traits among Oryza sativa and O. glaberrima Cultivars and their Interspecific Progenies
Author(s) -
Saito Kazuki,
Futakuchi Koichi
Publication year - 2010
Publication title -
crop science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.76
H-Index - 147
eISSN - 1435-0653
pISSN - 0011-183X
DOI - 10.2135/cropsci2009.06.0284
Subject(s) - biology , cultivar , oryza sativa , transpiration , stomatal conductance , botany , horticulture , stomatal density , interspecific competition , genotype , photosynthesis , genetics , gene
Epidermal conductance (g min ) is a measurement of water loss through the cuticle and stomata when stomatal conductance is minimal. Two pot experiments were conducted to evaluate genotypic variation in g min for 10 to 12 rice cultivars ( Oryza spp.) grown under flooded conditions. Epidermal conductance was estimated by measuring loss of water from the excised topmost fully‐expanded leaves. Considerable genotypic variation in g min was found. Two O. glaberrima cultivars had lower g min , whereas the O. sativa lowland cultivars tended to have higher g min Excluding data for O. glaberrima , higher g min was associated with higher stomatal density × stomatal length, suggesting that residual stomatal transpiration contributes to genotypic variation in g min .