studies on the anatomy of petal drop in other species reveal that the process involves the separation of four to five rows of smaller transversely oriented cells that laid horizontally across the diameter at the juncture between the petal and the achene
Joyous Suiyigheh Tata and Hans Christian Wien
Vahid Rahimi Eichi, Stephen D. Tyerman and Michelle G. Wirthensohn
holder and finally were cleaved with a cold knife for scanning their internal anatomy ( Bastacky et al., 1995 ; Walther, 2003 ). Cross-sections were made from the middle parts of the leaves. Rotating the sample holder in the cryo-chamber allowed imaging
Qiubin Xiao and J. Brent Loy
leaves and the epidermal imprints observed. The method for making fruit epidermal peels was similar with the exception that one thin fruit slice was used for the epidermal peel. Observations of trichome anatomy were made with an Olympus SZ40 stereo
J. Naalamle Amissah, Dominick J. Paolillo Jr and Nina Bassuk
μm. Expt. 2: The sequence of events during adventitious root development. The anatomy of stem segments during rooting was investigated to identify the sites of initiation of root primordia and to make a temporal record of the progress of
Justine E. Vanden Heuvel and Martin C. Goffinet
tissue responses to flooding has not been published for cranberry. The objective of this research was to determine the effect of water temperature during spring and fall floods on TNSC and anatomy/morphology of ‘Stevens’ and ‘Early Black’ cranberry vines
Rodney O. Jones and Robert L. Geneve
The seedcoat anatomy in the hilar region was examined in dry, imbibed and germinating seeds of Eastern redbud (Cercis canadensis L.). A discontinuous area was observed between macrosclereid cells in the palisade layer of the seedcoat which formed a hilar slit. A cap was formed during germination as the seedcoat separated along the hilar slit and was hinged by the macrosclereids in the area of the seedcoat opposite to the hilar slit. The discontinuity observed in the palisade layer was the remnant of the area traversed by the vascular trace between the funiculus and the seedcoat of the developing ovule. There were no apparent anatomical differences in the hilar region of the seedcoat between dormant and nondormant imbibed seeds. However, the thickened mesophyll of the seedcoat in this region and the capacity of the endosperm to stretch along with the elongating radicle may contribute to maintaining dormancy in redbud seeds.
Rodney Jones and Robert Geneve
Redbud (Cercis canadensis) is a small woody ornamental legume that has a hard seed coat, which imposes physical dormancy, typical of many legumes. Redbud also possesses an internal embryo dormancy that must be overcome by stratification. In order to observe the relationship between anatomy and germination, seeds were embedded in JB-4 resin during various developmental and germination stages. The seeds were cut longitudinally with a glass bladed microtome, to observe the radicle, vascular traces and testa. It appears that the vascular traces left from the funiculus serve as a weak point in non-dormant seeds that allows the radicle to rupture the testa during germination.
Jaroslav Ďurkovič, František Kačík, Miroslava Mamoňová, Monika Kardošová, Roman Longauer and Jana Krajňáková
sugar composition, plus vessel and fiber anatomy traits, to reveal any mechanical advantages or compensations for either stock type. Materials and Methods Plant material, study site, and sampling. The experiments were conducted on clonally
Gary L. McDaniel, Effin T. Graham and Kathleen R. Maleug
The effects of growth-retarding chemicals on stem anatomy were compared on poinsettia (Euphorbia pulcherrima Wind. `Annette Hegg Dark Red'). Micrographic examinations revealed that secondary walls of nonsclerotic phloem fiber cells were either completely or greatly reduced by retardant treatment. Wall thickening of phloem fiber cells was eliminated by paclobutrazol foliar sprays at 25 mg·liter-1. Fiber cell development was reduced, but not eliminated, by sprays of chlormequat and ancymidol at standard rates, while the triazole uniconazole at 10 mg·liter-1 permitted only limited fiber wall thickening. Chemical names used: (2-chloroethyl)-trimethyl ammonium chloride (chlormequat); α -cyclopropylα- (4-methoxyphenyl) -5-pyrimidine methanol (ancymidol); (E)-(p -chlorophenyl)-4,4-dimethyl-2-(1,2,4-triazol-1-yl-1-penten-3-ol (uniconazole): and (R*,R*)- β -[(4-chlorophenyl)methyl]- α -(1,1-dimethylethyl)- 1 H-1,2,4,triazole-1-ethanol (paclobutrazol).
The present investigation was carried out to determine the effect of salinity on three grapevine leaf anatomy. The experiment was conducted in box culture with two mixed salts (NaCl and CaCl2) at five concentrations (0, 1000, 2000, 3000 and 4500 ppm) and three cultivars, namely, `Thompson seedless', `Flame seedless' and `Robby seedless'. Increasing salinity significantly reduced the total axes of the epidermis, assimilating, vascular and ground tissues of the leaf. It also changed the ratio of the upper to the lower epiderm tissue. The differences among the three cultivars were not significant. The area of the palisade tissue was larger than the area of the spongy tissue in case of the control or 1000 ppm salinity treatments, while higher concentration of salinity resulted reverse in a situation. The xylem area was larger than that of the phloem at all concentrations under study. The area of parenchyma tissue was consistantly larger than that of mechanical tissue.