STUDIES ON MORPHOLOGY, REPRODUCTIVE BIOLOGY AND PRODUCTION OF Oenothera biennis L.
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Date
2011
Authors
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Publisher
UHF,NAUNI,SOLAN
Abstract
ABSTRACT
The present investigations entitled “Studies on morphology, reproductive biology and production
of Oeothera biennis L.” was carried out in laboratory and experimental areas of Department of Forest Products
Dr Y S Parmar University of Horticulture and Forestry, Nauni, Solan during 2009-2010 with the objectives, to
study the morphological features and reproductive biology and to study the effects of FYM and spacings on the
growth and yield. The species was found to be annual/biennial herb having reduced stem with rosette of simple
radicle leaves and after about 1 month growth emergence of branched single flowering shoot bearing cauline
leaves which gradually dimnishing in size upward. Adventitious type of root system was found in this plant.
Flowering starts from the 3rd week of July (20th July) i.e., 130 days after seed sowing and continued till 2nd week
of October (10th October) i.e., about 3 months. Inflorescence was observed to be racemose type (spike). Flowers
were Bracteate, sessile, complete, actinomorphic, tetramerous, tetracyclic, hermaphrodite, epigynous, yellow.
The type of dichogamy present in its flower was protandry where anthers mature first as compared to stigma and
where anther dehisce in bud condition while stigma become receptive at anthesis. Fruit set % under controlled
cross (97.50%), open pollination (95.00%) and open cross (85.00%) were the highest values indicating
preference for cross pollination compared with 97.50% and 62.50% fruit set under controlled self and bagging,
respectively. In “Pollination studies” the species was found to favour cross pollination with 62.50% potential for
self pollination. Seed set as a result of bagging, open pollination, open cross, controlled self and controlled cross
conditions gave non-significant differences in seed germination percent (94.00 – 96.50 %) indicating the self as
well as cross compatible nature of species. Self compatible nature of the species can be exploited for getting
fertile inbred seeds especially of superior lines. In 2nd experiment four different treatments viz., T1(control), T2
(15t/ha FYM), T3 (30t/ha FYM) and T4 (45t/ha) with four spacings viz., S1 (30x30 cm), S2 (30x45 cm), T3
(45x45 cm) and T4 (45x60 cm) were studied to observe the impact of these treatments on production parameters.
The treatment of 45 t/ha gave maximum plant height (160.9 cm), number of branches/plant (14.9), plant spread
(80.2 cm), number of flowers/plant (297.4), number of capsules/plant (283.8), seed yield/plant (35.4 g) and seed
yield/ha (220.4 kg). There were no significant effect of FYM on number of seeds per capsule and oil (%).
Maximum values for number of branches per plant (17.5), plant spread (99.7 cm), number of flowers per plant
(301.1), number of capsules per plant (285.4), seed yield per plant (42.6 g) were recorded at S4 (45x60 cm)
spacing. Maximum value for plant height (166.1 cm) and seed yield per ha (255.6 kg) were recorded with S1
(30x30 cm) spacing. The plant height and seed yield/ha decreased with the further increase in spacing. Spacing
also showed non-significant results on number of seeds per capsule and oil (%) of Oenothera biennis L.
Description
Keywords
irrigation, energy resources, biological phenomena, land resources, environment, wood, economics, seasons, manpower, planting