الفهرس 
Material and methodsOnly 14 pages are availabe for public view
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Abstract
v. SUMMARY AND CONCLUSION
EFFECT OF SOME CUCURBITS ROOTSTOCKS ON GROWTH, YIELD
AND RESISTANCE TO SOME SOIL PESTS OF CUCUMBER UNDER
PLASTIC HOUSES
Two field experiments were carried out in plastic green house (60m.L.
X 9m.W. X 3m height) at Kaha Research Station, Horticulture Research
Institute, Agricultural Research Center, Ministry of Agriculture, Giza, during
the two autumn and spring successive seasons of 1996 - 1997 and 1997 _
1998.
This study was conducted to elucidate the effect of grafting cucumber
Passandra FI hybrid which is a susceptible to fusarium wilt disease and
nematode on four cucurbitaceous rootstocks i.e., figleaf gourd, bottle gourd,
pumpkin and squash on plant growth, flowering, yield, leaf chemical
composition and fruit physical and chemical characteristics as well as the
effect of infection with fusarium and nematode on eleven cucurbitaceous
rootstocks.
The obtained results can be summarized as follows :_
1- The obtained results showed thatfigleaf gourd is the best rootstock for
resistantance to fusarium wilt and nematode infection percentages and
diseases severity followed by bottle gourd and pumpkin.
2- Successive transverse section in grafted union of different four
rootstocks showed that figleaf gourd and pumpkin were the best stocks
regarding the degree or ratio of successful grafting and physiological
compatibility.
3- Lateral roots were obtained at all rootstocks especially from the scion
grafted on squash and bottle gourd. Once the grafting was compeletly
succeeded the development of lateral roots was blocked before the
lateral roots become morphologically visible.
4- Grafting cucumber onto figleaf gourd or pumpkin increased percentage
of successful grafting.
5- Grafting on figleaf gourd and bottle gourd had the most promotive effect
on plant length in both autumn plantations. Meanwhile, the figleaf gourd
and pumpkin as rootstocks had the most increasing effect on plant length
in both spring plantations.
6- Grafting cucumber on the used four rootstocks on the number of leaves
per plant, data indicated that grafting had no significant effect on
increasing the number of leaves in the autumn and spring plantation
except in the second spring season.
7- The figleaf gourd and pumpkin as rootstocks showed the highest values
of leaf area in both spring and first autumn plantation but did not reach
to the level of significancy.
8- Concering the effect of grafting on fresh and dry weight of stem, leaves
and total foliage, figleaf gourd and bottle gourd had the highest effect on
fresh and dry weights of plant foliage at both autumn plantation.
Meanwhile, cucumber grown onto figleaf gourd and pumpkin had the
highest values at both spring plantations.
9- Cucumber grafted on figleaf gourd and pumpkin resulted in the
significantly highest values of chlorophyll a, total chlorophyll and
carotenoids while, bottle gourd had a highest value of chlorophyll b
at both autumn plantations. Meanwhile, cucumber grafted on figleaf
gourd and pumpkin had the highest values of chlorophyll a,b, total
chlorophyll and carotenoids content in plant leaves at both spring
plantations.
10- Figleaf gourd had the highest values for the effect of grafting on total
phenols and indoles of scion leaves than other rootstocks and control.
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11- Using figleaf gourd followed by pumpkin as rootstocks significantly
increased the values of such plant foliage constituents of macro elements
at both seasons of this work except first autumn plantation figleaf gourd
followed by bottle gourd for plant foliage constituents ofN.P. K. Ca and
Mg.
12- Concerning the effect of grafting on protein analysis scion leaves, the
results of the water soluble protein, the presence of seven novel protein
bands that were absents in control plant leaves. The results of the water
nonsoluble protein indicated the presence of five novel proteins that
were absent in the control leaves. These results suggest the possible
migration of some proteins across the graft union via the connecting
area.
13- Grafting on different rootstocks led to the decrement in the number of
days required for appearance of the first flower specially at the use of
figleaf gourd.
14- Grafting on four rootstocks increased the number of flowers per plant
compared with cucumber without grafting specially pumpkin at autumn
plantation while figleaf gourd came at the first rank at both spring
plantations.
15- Grafting cucumber onto figleaf gourd or pumpkin increased percentage
of fruit set while the grafting cucumber onto bottle gourd led to
decrement in percentage of fruit set during both autumn and spring
plantations.
16- Using figleaf gourd and pumpkin as rootstocks significantly increased
the number of fruits per plant at both autumn and spring seasons.
17_ Bottle gourd as rootstock had the highest value for the fruit weight at
both autumn and spring plantations.
18- The maximum early and total yield per plant as well as total yield kg/rrr’
were obtained from plants grafted on figleaf gourd and pumpkin
compared with those plants grafted on the other rootstocks.
19- Fruit quality:
A- Concerning fruit quality, it was found that grafting led to a
significant increment in fruit length and diameter especially in
autumn season. The Bottle gourd was distinguished compared with
the control or the other used rootstocks. However, grafting had no
significant effect on fruit length particularly in the first season of the
spring plantation.
B- The total soluble solids was significantly increased in fruits resulted
from the cucumber grown onto pumpkin or figleaf gourd in either
autumn or spring seasons.
C- Using figleaf gourd rootstocks increased the total carbohydrates in
fruits in either autumn or spring seasons.
D- Fruits produced from cucumber plants that grown onto Bottle gourd
showed high physical characteristics expressed in colour, shape,
flavour, smell and touch compared with the other usedrootstocks.
Figleaf gourd and pumpkin came in the second and third rank
respectively. Meanwhile, The control followed by squash came in the
following ranks.
20- Evidently, from these results, it may be concluded that all rootstocks are
nearly superior at all parameters compared with control (cucumber
without grafting) especially figleaf gourd and pumpkin or bottle gourd.
Generally, it is advisable to use figleaf gourd and pumpkin as rootstocks
for maximum growth and yield while it may be recommended to use
figleaf gourd or bottle gourd to avoid infection with fusaruim disease
and nematode.