Physiological and Biochemical Changes Accompanying Pollination in Orchid Flowers: I. General Observations and Water Relations

Hsiang, Tsung-Hsun T.

doi:10.1104/pp.26.3.441

Cited by 38 publications

(15 citation statements)

References 15 publications

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“…It was shown that the stimulation of respiration normally occurred before there was any appreciable increase in fresh weight which, in turn, usually preceded the dry weight increase. This seems to imply that increased respiration is necessary for the accelerated water uptake, which is in line with the fact revealed in the water relation studies (19), that part of the augmented water uptake is dependent upon aerobic res;piration.…”

supporting

confidence: 67%

“…The general methods used in sampling and treatment of flowers are essentially the same as that earlier described (19). A general conclusion, based on all experimental facts presented in both papers, is also given here.…”

mentioning

confidence: 61%

“…It is therefore logical to conclude that respiration furnishes the energy for the accelerated water uptake. The aerobic nature of the pollen-stimulated water uptake is cletarly demonstrated in the experiment with cut discs of columns of pollinated flowers (19). In air such discs absorb more water than those from columns of non-pollinated flowers.…”

mentioning

confidence: 75%

“…The data presented in this paper and the previous paper (19) show that the transfer of pollen to the stigma brings about marked changes in the physiology of the flower within several hours. It is the present intention, by correlating these changes with one another, to form a more continuous and complete picture and to consider the problem of pollination from a theoretical aspect.…”

mentioning

confidence: 77%

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Physiological and Biochemical Changes Accompanying Pollination in Orchid Flowers. Ii. Respiration, Catalase Activity, and Chemical Constituents

Hsiang

1951

Plant Physiol.

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In a previous paper of this series (19), data have been presented to show that pollination in orchid flowers brings about considerable changes in their water balance. The present paper deals with the change in respiratory activity, catalase activity, and chemical constituents as consequences of pollination and auxin treatment. The general methods used in sampling and treatment of flowers are essentially the same as that earlier described (19). A general conclusion, based on all experimental facts presented in both papers, is also given here.Respiration WHITE (35) noted an increase of respiratory rate and also of respiratory quotient after pollination in a number of plant species. A critical examination of her data, however, would seem to show that the respiratory quotient was unusually low for the non-pollinated plants, indicating that some constant errors might have been involved. Moreover, in most of the plants she used, fertilization is known to follow pollination more or less closely. It is therefore not safe to attribute the observed effects, if valid, to pollination alone. Further work is needed on the effect of pollination on respiration.In the work reported here respiration was measured as the amount of 02 taken up per unit of time per unit of dry weight. A Warburg respirometer of the constant volume type was employed. All experiments were run at 250 + 0.20 C.Preliminary study showed that when tissue sections were floated on phosphate buffer solution at a pH of 5.8 the liquid tended to enter the intercellular spaces and gave the tissues a translucent appearance. Therefore, the use of the buffer solution was omitted and the tissues were put directly into the flasks without any added liquid. Two tenths of a milliliter of 20% KOH on filter paper was used in the center well. After equilibration, readings were taken at 15-or 30-minute intervals until several constant values had been obtained. An average reading of four to six intervals was usually taken to represent the respiration value.The respiratory quotient was obtained by using the same sample in the same flask, instead of using two separate flasks. Readings were first taken without KOH in the center well; KOH was then added and readings were I Present address:

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confidence: 67%

mentioning

confidence: 61%

mentioning

confidence: 75%

mentioning

confidence: 77%

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Physiological and Biochemical Changes Accompanying Pollination in Orchid Flowers. Ii. Respiration, Catalase Activity, and Chemical Constituents

Hsiang

1951

Plant Physiol.

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“…He suggested that products associated with lignification impaired water uptake. Similarly in roses and other cut flowers, it was reported that after cutting, water loss decreased sharply due to stomatal closure (Mayak et al 1974); water loss then paralleled water uptake (Burdett 1970, Halevy et al 1974 and finally an increase in water loss occurred before wilting (Hsiang 1951, Halevy et al 1974, Van Meeteren 1978. • Sunway variety had the longest vase life, followed by Primrose and Malibu.…”

Section: Interaction Effect Of Seasons and Varieties On Vase Life Of mentioning

confidence: 99%

Influence of Seasons and Varieties on Vase Life of Gerbera (<i>Gerbera jamesonii</i> Hook.) Cut Flower

Acharya¹,

Baral²,

Gautam³

et al. 1970

Nepal Journal of Science and Technology

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Postharvest studies were carried out in three varieties of (Gerbera jamesonii Hook.) cvs. Primrose, Malibu and Sunway to find out the effect of growing seasons (autumn, winter and spring) on the vase life of cut flowers during September 2009 to March 2010. Laboratory experiments were carried out in controlled room having 18±2 o C temperature, 68±2% relative humidity and 100 lux light. The study revealed that the longest vase life was noticed in Sunway, followed by Primrose and Malibu. Regarding the season of production, longest vase life (18.37 days) was found in the flowers harvested in winter, followed by spring (14.8 days) and autumn (9.57 days). The interaction effect of season and variety showed that longest vase life (23.2 days) was found in Sunway harvested in winter whereas the shorter vase lives (5.7 and 7.8 days) were in Malibu and Primrose respectively harvested in autumn. Stalk length (57.88 cm) and floral diameter (10.78 cm) were highest in autumn while diameter of the stalk (0.64 cm) was the highest in spring. Sunway had the highest floral and stalk diameters, while the stalk length was longer in Malibu and Primrose. Total water uptake during the vase life was highest in flowers grown in winter (34.9 ml), followed by spring (34.7 ml) and autumn (26.14 ml).

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Senescence and Postharvest Physiology of Cut Flowers—Part 2

Halevy

Mayak

1981

Horticultural Reviews

330

135

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Physiological and Biochemical Changes Accompanying Pollination in Orchid Flowers: I. General Observations and Water Relations

Cited by 38 publications

References 15 publications

Physiological and Biochemical Changes Accompanying Pollination in Orchid Flowers. Ii. Respiration, Catalase Activity, and Chemical Constituents

Physiological and Biochemical Changes Accompanying Pollination in Orchid Flowers. Ii. Respiration, Catalase Activity, and Chemical Constituents

Influence of Seasons and Varieties on Vase Life of Gerbera (<i>Gerbera jamesonii</i> Hook.) Cut Flower

Senescence and Postharvest Physiology of Cut Flowers—Part 2

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