spongy parenchyma


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Related to spongy parenchyma: palisade layer

spongy parenchyma

[′spən·jē pə′reŋ·kə·mə]
(botany)
References in periodicals archive ?
For the cross sections in the median third region, the total thickness of the leaf blade, adaxial and abaxial cuticle, adaxial and abaxial epidermis, mesophyll, palisade and spongy parenchyma was quantitatively evaluated (n = 30).
Mesophyll is consisted of palisade and spongy parenchyma (Fig.
ad = adaxial surface; ab = abaxial surface; pp = palisade parenchyma; sp = spongy parenchyma; vb = vascular bundles; cp = cortical parenchyma; co = collenchyma; sc = sclerified cells; ss = sclerenchyma sheath; ph = phloem; xl = xylem.
The nearby palisade and spongy parenchyma cells were observed to become surrounded by bacterium with subsequent thinning and disruption of cell walls.
The California red scale SB moves perpendicularly into the palisade parenchyma and then obliquely or parallel to the spongy parenchyma, keeping more than 85% of its length in both parenchyma tissues.
The formation of smaller palisade cells was found only in juvenile leaves of irradiated seeds, while an increase in cell size was found only in spongy parenchyma and lower epidermis of compound leaves from seeds irradiated at 100 Gy.
Below this tissue there is an extensive spongy parenchyma with large air chambers (Fig.
These include: non-vascular fibrous strands located under the adaxial hypodermis and in the spongy parenchyma between the major vascular bundles, variable in shape and in number of fibers; round stegmata surrounding fiber strands; cellulose non-vascular fiber very elongated, acute at the ends, with thick walls; lignified vascular fibers short, septate, spindle-shaped and acute, located at the ends of the major and minor vascular bundles.
The leaf has bifacial organization, with a palisade parenchyma formed by 1-3 layers of prismatic cells in adaxial subepidermal position and a spongy parenchyma towards the abaxial epidermis (Fig.
Below the hypodermis, the palisade parenchyma is readily distinguished from the spongy parenchyma (Table 2).