Some findings in leaf characters of cassava varieties

By:

OKA, M

Contributor(s):

MATSUDA, T

Material type: Article

ArticleLanguage: English Description: 17(1):69-72Subject(s): LOC classification:

22075

Online resources:

Click here to access online

In: Japan Agricultural Research QuarterlySummary: Se estudiaron las caracteristicas de las hojas de cv. indonesios de yuca. La resistencia estomatal a la difusion del agua (rs) en ambas superficies y el contenido de clorofila fueron medidos; en la cobertura foliar superior se observaron la distribucion y densidad de los estomas en hojas completamente expandidas. El rs.ad (superficie adaxial) dio un valor infinito, mientras que el rs.ab (superficie abaxial) fue menor. Estos resultados estan relacionados con el no. de estomas encontrados en ambas superficies: muy pocos en la superficie adaxial y localizados en ambos lados de largas nervaduras grandes, y un gran no. bastante distribuido en la superficie abaxial. El tamano de los estomas fue similar en ambos lados; las celulas oclusivas tienen una longitud prom. de 28 micrones. Hubo una diferencia var. significativa en el rs.ab; tambien hubo grandes diferencias var. significativas en el contenido de clorofila al nivel de 1 por ciento , pero este no se vio afectado por la posicion de la hoja. La baja densidad estomatica adaxial y el arreglo compacto de las celulas del parenquima en empalizada restringen la difusion del CO2. (CIAT)Summary: Leaf characteristics of Indonesian cassava cv. were studied. Stomatal resistance to water diffusion (rs) on both surfaces and chlorophyll content were measured; the distribution and density of stomata in fully expanded leaves in the upper canopy were observed. The rs.ad (adaxial surface) gave an infinite value while the rs.ab (abaxial surface) was lower. These results are related to the no. of stomata observed on both surfaces: very few on the adaxial surface and located on both sides of large veins, and a large no. highly distributed on the abaxial surface. The size of the stomata was similar on both sides having the guard cells an av. length of 28 microns. There was a significant var. difference in rs.ab; there were also large significant var. differences in chlorophyll content at the 1 percent level, but it was not affected by the leaf position. The low adaxial stomatal density and the compact arrangement of the palisade cells appear to restrict CO2 diffusion. (CIAT)

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Holdings ( 2 )
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Holdings
Item type	Current library	Collection	Call number	Copy number	Status	Date due	Barcode	Item holds
Journal Article	CIAT Library Web	Electronic Document	22075 (Browse shelf(Opens below))		Not for loan
Journal Article	CIAT Library Document collection CINFOS	Document Collection CINFOS	22075 (Browse shelf(Opens below))	c.1	Short Loan		100054547

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Se estudiaron las caracteristicas de las hojas de cv. indonesios de yuca. La resistencia estomatal a la difusion del agua (rs) en ambas superficies y el contenido de clorofila fueron medidos; en la cobertura foliar superior se observaron la distribucion y densidad de los estomas en hojas completamente expandidas. El rs.ad (superficie adaxial) dio un valor infinito, mientras que el rs.ab (superficie abaxial) fue menor. Estos resultados estan relacionados con el no. de estomas encontrados en ambas superficies: muy pocos en la superficie adaxial y localizados en ambos lados de largas nervaduras grandes, y un gran no. bastante distribuido en la superficie abaxial. El tamano de los estomas fue similar en ambos lados; las celulas oclusivas tienen una longitud prom. de 28 micrones. Hubo una diferencia var. significativa en el rs.ab; tambien hubo grandes diferencias var. significativas en el contenido de clorofila al nivel de 1 por ciento , pero este no se vio afectado por la posicion de la hoja. La baja densidad estomatica adaxial y el arreglo compacto de las celulas del parenquima en empalizada restringen la difusion del CO2. (CIAT)

Leaf characteristics of Indonesian cassava cv. were studied. Stomatal resistance to water diffusion (rs) on both surfaces and chlorophyll content were measured; the distribution and density of stomata in fully expanded leaves in the upper canopy were observed. The rs.ad (adaxial surface) gave an infinite value while the rs.ab (abaxial surface) was lower. These results are related to the no. of stomata observed on both surfaces: very few on the adaxial surface and located on both sides of large veins, and a large no. highly distributed on the abaxial surface. The size of the stomata was similar on both sides having the guard cells an av. length of 28 microns. There was a significant var. difference in rs.ab; there were also large significant var. differences in chlorophyll content at the 1 percent level, but it was not affected by the leaf position. The low adaxial stomatal density and the compact arrangement of the palisade cells appear to restrict CO2 diffusion. (CIAT)