scholarly journals Cyanide Metabolism in Relation to Ethylene Production in Plant Tissues

1988 ◽  
Vol 88 (2) ◽  
pp. 473-476 ◽  
Author(s):  
Wing-Kin Yip ◽  
Shang Fa Yang
Keyword(s):  
Ethylene Production ◽  
Plant Tissues ◽  
Cyanide Metabolism

scholarly journals Ethylene Production and Enzyme Induction in Excised Plant Tissues

1971 ◽  
Vol 48 (1) ◽  
pp. 94-96 ◽  
Author(s):  
G. Engelsma ◽  
J. M. H. van Bruggen
Keyword(s):  
Enzyme Induction ◽  
Ethylene Production ◽  
Plant Tissues

scholarly journals Ethylene Production by Slices of Green Banana Fruit and Potato Tuber Tissue During The Development of Induced Respiration

1969 ◽  
Vol 22 (2) ◽  
pp. 489 ◽  
Author(s):  
WB Mcglasson
Keyword(s):  
Ethylene Production ◽  
Plant Tissues ◽  
Underground Storage ◽  
Banana Fruit ◽  
Physiological Changes ◽  
Tissue Slices ◽  
Tuber Tissue ◽  
Plant Parts ◽  
Storage Organs ◽  
Green Banana

It is well known that injury and infection by disease organisms may stimulate ethylene production by plant tissues (Williamson 1950; Burg 1962; McGlasson and Pratt 1964). The increased ethylene production which results from injury in fruit tissues may hasten the onset of a respiratory climacteric. This response, which has been observed in slices cut from three-quarter-grown cantaloupe fruit, may herald the commencement of physiological changes leading to natural ripening (McGlasson and Pratt 1964). However, in underground storage tissues, stimulated ethylene production may be concerned with the mechanisms of wound healing (Stahmann, Clare, and Woodbury 1966; Imaseki, Uchiyama, and Uritani 1968). The phenomenon of induced respiration in tissue slices of bulky underground storage organs has been known for many years (Laties 1967) and more recently it has been found to occur in sections or slices of other plant parts (ap Rees 1966). Palmer and McGlasson (1969) observed a similar rise in slices of green banana fruit which they considered to be a form of "induced" respiration.

scholarly journals Climacteric Fruit Produce a Diminished Respiratory Climacteric When Ripened on the Plant

HortScience ◽  
1996 ◽  
Vol 31 (4) ◽  
pp. 690e-691
Author(s):  
M.E. Saltveit
Keyword(s):  
Carbon Dioxide ◽  
Oxygen Consumption ◽  
Organic Acids ◽  
Ethylene Production ◽  
Carbon Dioxide Production ◽  
Plant Tissues ◽  
Rapid Rise ◽  
Fruit Crops ◽  
Climacteric Fruit

Respiration (i.e., carbon dioxide production and oxygen consumption) increases as ripening is initiated in a group of harvested fruit called climacteric. This group includes many horticulturally important fruit crops, such as apples, avocados, bananas, melons, peaches, pears, and tomatoes. Other fruit, which includes cherries, citrus, and strawberries, do not exhibit an increase in respiration as they ripen and are called nonclimacteric. Measurements of carbon dioxide production by ripening apples, melons, and tomatoes revealed a well-defined climacteric, but only in harvested fruit. The respiratory climacteric was greatly diminished or absent from these fruit when they ripened while attached to the plant. Fixation of respired carbon dioxide through photosynthesis or into organic acids was insufficient to account for the diminished amount of carbon dioxide evolved from ripening attached climacteric fruit. Unlike the respiratory climacteric, an increase in ethylene production occurred in both attached and harvested climacteric fruit. Ethylene stimulates respiration in most plant tissues. The rapid rise in respiration as soon as attached ripening climacteric fruit were harvested or abscised suggests that an inhibitor of ethylene-stimulated respiration may be translocated from the plant and prevent the climacteric rise in respiration in attached ripening fruit.

Salicylic acid inhibition of ethylene production by apple discs and other plant tissues

1989 ◽  
Vol 8 (1) ◽  
pp. 63-69 ◽  
Author(s):  
Roger J. Romani ◽  
Betty M. Hess ◽  
Charles A. Leslie
Keyword(s):  
Salicylic Acid ◽  
Ethylene Production ◽  
Acid Inhibition ◽  
Plant Tissues

INHIBITION OF ETHYLENE PRODUCTION IN PLANT TISSUES BY 8-HYDROXYQUINOLINE

1973 ◽  
Vol 53 (2) ◽  
pp. 351-353 ◽  
Author(s):  
E. V. PARUPS ◽  
E. A. PETERSON
Keyword(s):  
Ethylene Production ◽  
Plant Tissues

not available

Microscopy studies of powdery mildew on summer squash

1991 ◽  
Vol 49 ◽  
pp. 520-521
Author(s):  
John S. Gardner ◽  
W. M. Hess
Keyword(s):  
Powdery Mildew ◽  
Tip Growth ◽  
Hyphal Growth ◽  
Plant Tissues ◽  
Vegetative Hypha ◽  
Powdery Mildews ◽  
Summer Squash ◽  
Conidial Formation ◽  
Polar Tip Growth ◽  
Short Conidiophore

Powdery mildews are characterized by the appearance of spots or patches of a white to grayish, powdery, mildewy growth on plant tissues, entire leaves or other organs. Ervsiphe cichoracearum, the powdery mildew of cucurbits is among the most serious parasites, and the most common. The conidia are formed similar to the process described for Ervsiphe graminis by Cole and Samson. Theconidial chains mature basipetally from a short, conidiophore mother-cell at the base of the fertile hypha which arises holoblastically from the conidiophore. During early development it probably elongates by polar-tip growth like a vegetative hypha. A septum forms just above the conidiophore apex. Additional septa develop in acropetal succession. However, the conidia of E. cichoracearum are more doliform than condia from E. graminis. The purpose of these investigations was to use scanning electron microscopy (SEM) to demonstrate the nature of hyphal growth and conidial formation of E. cichoracearum on field-grown squash leaves.

Localization of acid phosphatases in root cap of rice plant

1991 ◽  
Vol 49 ◽  
pp. 224-225
Author(s):  
Y. R. Chen ◽  
Y. F. Huang ◽  
W. S. Chen
Keyword(s):  
Rice Plant ◽  
Developmental Stages ◽  
Uranyl Acetate ◽  
Root Cap ◽  
Plant Tissues ◽  
Acid Phosphatases ◽  
Root Tips ◽  
Buffer Solution ◽  
Cacodylate Buffer ◽  
Ethanol Series

Acid phosphatases are widely distributed in different tisssues of various plants. Studies on subcellular localization of acid phosphatases show they might be present in cell wall, plasma lemma, mitochondria, plastid, vacuole and nucleus. However, their localization in rice cell varies with developmental stages of cells and plant tissues. In present study, acid phosphatases occurring in root cap are examined.Sliced root tips of ten-day-old rice(Oryza sativa) seedlings were fixed in 0.1M cacodylate buffer containing 2.5% glutaraldehyde for 2h, washed overnight in same buffer solution, incubated in Gomori's solution at 37° C for 90min, post-fixed in OsO4, dehydrated in ethanol series and finally embeded in Spurr's resin. Sections were doubly stained with uranyl acetate and lead citrate, and observed under Hitachi H-600 at 75 KV.

Cryosectioning plant roots prepared by high-pressure freezing

1987 ◽  
Vol 45 ◽  
pp. 662-663
Author(s):  
R.E. Crang ◽  
M. Mueller ◽  
K. Zierold
Keyword(s):  
High Pressure ◽  
Cell Walls ◽  
Plant Tissues ◽  
Ice Crystal ◽  
High Pressure Freezing ◽  
Vitreous State ◽  
Radial Depth ◽  
Irregular Topography ◽  
Considerable Depth ◽  
Conventional Freezing

Obtaining frozen-hydrated sections of plant tissues for electron microscopy and microanalysis has been considered difficult, if not impossible, due primarily to the considerable depth of effective freezing in the tissues which would be required. The greatest depth of vitreous freezing is generally considered to be only 15-20 μm in animal specimens. Plant cells are often much larger in diameter and, if several cells are required to be intact, ice crystal damage can be expected to be so severe as to prevent successful cryoultramicrotomy. The very nature of cell walls, intercellular air spaces, irregular topography, and large vacuoles often make it impractical to use immersion, metal-mirror, or jet freezing techniques for botanical material.However, it has been proposed that high-pressure freezing (HPF) may offer an alternative to the more conventional freezing techniques, inasmuch as non-cryoprotected specimens may be frozen in a vitreous, or near-vitreous state, to a radial depth of at least 0.5 mm.

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