Krishna UPADHAYA, Harendra Nath PANDEY, Pynsakhiat S. LAW

The Effect of Seed Mass on Germination, Seedling Survival and Growth in Prunus jenkinsii Hook.f. & Thoms.

The effect of seed mass on germination, seedling survival and growth was investigated in Prunus jenkinsii Hook.f. & Thoms. (Rosaceae), an evergreen tree species. Seed mass varied from a minimum of 0.5 g to a maximum of 2.72 g. Seed mass had a significant effect on the percentage of seeds that germinated: 28%, 41% and 42%, respectively, of light- (1.5 g), intermediate- (> 1.5 to 2 g) and heavy-weight (> 2 g) seeds germinated. After 1 year of germination, the seedlings that arose from heavy-, intermediate- and light-weight seeds showed 80%, 63% and 42% survival, respectively. Seedling vigour, expressed in terms of shoot and root length, number of leaves, leaf area and dry matter yield, was significantly affected by seed mass. Seedlings that emerged from heavy seeds showed better growth and produced heavier seedlings as compared to intermediate- and light-weight seed categories.

Anahtar Kelimeler:

Seed mass, germination, seedling survival, seedling vigour

The Effect of Seed Mass on Germination, Seedling Survival and Growth in Prunus jenkinsii Hook.f. & Thoms.

Keywords:

Seed mass, germination, seedling survival, seedling vigour,

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Armstrong DP & Westoby M (1993). Seedlings from large seeds tolerate defoliation better: a test using phylogenetically independent contrasts. Ecology 74: 1092-1100.
Baker HG (1972). Seed weight in relation to environmental conditions in California. Ecology 53: 997-1010.
Balakrishnan NP (1981). Flora of Jowai, Meghalaya, Vol. I. Botanical Survey of India, Howrah.
Barik SK, Tripathi RS, Pandey HN & Rao P (1996). Tree regeneration in a subtropical humid forest: effect of cultural disturbance on seed production, dispersal and germination. J Appl Ecol 33: 1551-1560.
Bhuyan P, Khan ML & Uma Shankar (2000). Trade-off between dispersal efficiency and seedling fitness in Oroxylum indicum, a wind dispersed tropical tree. Int J Ecol Env Sci 26: 67-73.
Bonfil C (1998). The effect of seed size, cotyledon reserves, and herbivory on seedling survival and growth in Quercus rugosa and Q. laurina (Fagaceae). Am J Bot 85: 79-87.
Foster SA (1986). On the adaptive value of large seeds for tropical moist forest trees: a review and synthesis. Bot Rev 52: 261-299.
Foster SA & Janson SA (1985). The relationship between seed size and establishment conditions in tropical woody plants. Ecology 66: 773-780.
Ganeshaiah KN & Uma Shaanker R (1991). Seed size optimization in a wind dispersed tree Butea monosperma: A trade-off between seedling establishment and pod dispersal efficiency. Oikos 60: 3- 6.
Gross KL (1984). Effect of seed size and growth form on seedling establishment of six monocarpic perennials. J Ecol 72: 369-387.
Gross KL & Kromer ML (1986). Seed weight effects on growth and reproduction in Oenothera bennis L. Bull Torrey Bot Club 113: 252-258.
Grubb PJ (1996). Rainforest dynamics: the need for new paradigms. In: Edwards DS, Booth WE & Choy SC (eds.), Tropical Rainforest Research: Current Issues pp. 215-233 Kluwer, Dordrecht.
Grubb PJ & Coomes DA (1997). Seed mass and nutrient content in nutrient-starved tropical rainforest in Venezuela. Seed Sci Res 7: 269-280.
Grubb PJ & Burslem DFRP (1998). Mineral nutrient concentrations as a function of seed size within seed crop: implications for competition among seedlings and defence against herbivory. J Trop Ecol 14: 177-185.
Haridasan K & Rao RR (1985). Forest Flora of Meghalaya Vol. I. Bishen Singh Mahendra Pal Singh, Dehradun, India.
Hegde SG, Ganeshaiah KN & Uma Shaanker R (1991). Fruit preference criteria by avian furgivores: their implications for the evolution of clutch-size in Solanum pubescence. Oikos 60: 20-26.
Kanjilal VN, Kanjilal PC, Das A, De RN & Bor NL (1997). Flora of Assam Vol. II Omsons Publications, New Delhi.
Ke G & Werger MJA (1999). Different responses to shade of evergreen and deciduous oak seedlings and the effect of acorn size. Acta Oecol 20: 570-586.
Khan ML, Bhuyan P, Uma Shankar, Singh ND & Todaria NP (1999). Seed germination and seedling fitness in Mesua ferra L. in relation to fruit size and seed number per fruit. Acta Oecol 20: 599-606.
Khan ML & Uma Shankar (2001). Effect of seed weight, light regime, and substratum microsite on germination and seedling growth of Quercus semiserrata Roxb. Trop Ecol 42: 117-125.
Khan ML, Bhuyan P, Singh ND & Todaria NP (2002). Fruit set, seed germination and seedling growth of Mesua ferra Linn. (Clusiaceae) in relation to light intensity. J Trop Forest Sci 14: 35- 48.
Long TJ & Jones RH (1996). Seedling growth strategies and seed size effects in fourteen oak species native to different soil moisture habitats. Trends in Ecol Evol 11: 1-8.
Marshall DL (1986). Effect of seed size on seedling success in three species of Sesbania (Fabaceae). Am J Bot 73: 457-464.
McGinley MA, Temme DH & Geber MA (1987). Parental investment in offspring in variable environments: Theoretical and empirical considerations- Am Nat 130: 370-398.
Meyer SE & Carlson SL (2001). Achene mass variation in Ericameria nauseosus (Asteraceae) in relation to dispersal ability and seedling fitness. Fun Ecol 15: 274-281.
Murali KS (1997). Pattern of seed size, germination and seed viability of tropical tree species in Southern India. Biotropica 29: 271- 279.
Perez-Garcia F, Iriondo JM & Martinez-Laborde JB (1995). Germination behaviour in seeds of Diplotaxis erucoides and D. virgata. Weed Res 35: 495-502.
Tripathi RS & Khan ML (1990). Effects of seed weight and microsite characteristics on germination and seedling fitness in two species of Quercus in a subtropical wet hill forest. Oikos 57: 289-296.
Vera ML (1997). Effects of altitude and seed size on germination and seedling survival of heath land plants in north Spain. Plant Ecol 133: 101-106.
Zar JH (1974). Biostatistical analysis, Englewood Cliffs, New Jersey: Prentice Hall.