lesson 6: plant reproduction
... so they will end up with multiple seeds. (Our “average” flower picture had only one ovule, so it would make only one seed.) While the ovules are turning into seeds, the ovary will change, too. In some plants, such as berries, tomatoes and grapes, the ovary becomes a soft fruit, while in other plants ...
... so they will end up with multiple seeds. (Our “average” flower picture had only one ovule, so it would make only one seed.) While the ovules are turning into seeds, the ovary will change, too. In some plants, such as berries, tomatoes and grapes, the ovary becomes a soft fruit, while in other plants ...
MAGNOLIOPHYTA (FLOWERING PLANTS): A LOGICAL AND
... insect specificity being crucial for the success of cross-pollination, every conceivable option or “tricks of the trade” has been in operation to attract the specific insect and to facilitate pollination. Attraction is accomplished by bedecking the flower in the form of an insect. This mimicking is ...
... insect specificity being crucial for the success of cross-pollination, every conceivable option or “tricks of the trade” has been in operation to attract the specific insect and to facilitate pollination. Attraction is accomplished by bedecking the flower in the form of an insect. This mimicking is ...
In This Issue - The Cycad Society
... megasporophylls of genera other than Cycas each hold two seeds. Artificial pollination and seed propagation necessitate an intimate familiarity with cones and seed structure. Nearly all cycads are endangered, threatened, or commercially exploited to excess. In some cases they nearly or completely ha ...
... megasporophylls of genera other than Cycas each hold two seeds. Artificial pollination and seed propagation necessitate an intimate familiarity with cones and seed structure. Nearly all cycads are endangered, threatened, or commercially exploited to excess. In some cases they nearly or completely ha ...
References
... heterostylism is known. One type of flower has long pistils and short stamens (pin type). The other type has long stamens and short pistils (thru type). There are also plants with equal length of pistils and stamens in flowers (Vančurová et al., 1966; Janovská et al., 2008). Samborova at al. (1989) ...
... heterostylism is known. One type of flower has long pistils and short stamens (pin type). The other type has long stamens and short pistils (thru type). There are also plants with equal length of pistils and stamens in flowers (Vančurová et al., 1966; Janovská et al., 2008). Samborova at al. (1989) ...
1 Assignment Discovery Online Curriculum Lesson title: Plant
... pollen season, which runs from late February through the middle of October in most parts of the United States. This information is often included in local weather reports. In this activity, you'll track the pollen counts reported in your area, then take your own pollen counts from around your home. ...
... pollen season, which runs from late February through the middle of October in most parts of the United States. This information is often included in local weather reports. In this activity, you'll track the pollen counts reported in your area, then take your own pollen counts from around your home. ...
full text pdf
... shape and the number of apertures in these pollen grains was usually three (tricolpate); however, four ...
... shape and the number of apertures in these pollen grains was usually three (tricolpate); however, four ...
Natural History Note
... from mutualistic pollinators and antagonistic herbivores has received most attention (Grant and Grant 1965; Stebbins 1970; Johnson and Steiner 2000; Fenster et al. 2004; Strauss and Whittall 2006), but flowers are also under strong selection from their physical environment (Corbet 1990; Herrera 1993 ...
... from mutualistic pollinators and antagonistic herbivores has received most attention (Grant and Grant 1965; Stebbins 1970; Johnson and Steiner 2000; Fenster et al. 2004; Strauss and Whittall 2006), but flowers are also under strong selection from their physical environment (Corbet 1990; Herrera 1993 ...
invaders? - Department of Primary Industries, Parks, Water and
... Environmental Weeds can come from all over the world. They can even be Australian native plants outside their natural range. These out-of-place natives can be as devastating as foreign plants. Environmental weeds can out-compete natives and reduce biodiversity. In the past 30 years at least 35% of a ...
... Environmental Weeds can come from all over the world. They can even be Australian native plants outside their natural range. These out-of-place natives can be as devastating as foreign plants. Environmental weeds can out-compete natives and reduce biodiversity. In the past 30 years at least 35% of a ...
GEKCO Arbor Day Tree Descriptions
... tree-like, and is a bit misleading in that this aloe is not really tree-like, but the name was originally applied to this species in reference to the stem-forming habit. The common name krantz aloe refers to its habitat, a krantz being a rocky ridge or cliff. Aloe arborescens is one of approximately ...
... tree-like, and is a bit misleading in that this aloe is not really tree-like, but the name was originally applied to this species in reference to the stem-forming habit. The common name krantz aloe refers to its habitat, a krantz being a rocky ridge or cliff. Aloe arborescens is one of approximately ...
Notes on the Floral Biology and Fruiting of Cycad Circinalis in Nigeria
... tasty chew. The fresh sap promotes healing of open wounds, while the fresh young leaves are grazed by livestock during drought or bush burning. The starch is also edible when the poisonous toxin had been removed through a process described by Stevenson and Osborne 2004. Cycads produce cycasin which ...
... tasty chew. The fresh sap promotes healing of open wounds, while the fresh young leaves are grazed by livestock during drought or bush burning. The starch is also edible when the poisonous toxin had been removed through a process described by Stevenson and Osborne 2004. Cycads produce cycasin which ...
Download chapter 1: Introduction
... process may be substantially influenced by rodents (Mendoza and Dirzo 2007). In the Pacific, invasive non-native animals such as pigs (Sus scrofa), rats, and mice (Mus musculus) can have pronounced effects on the flora and fauna of insular ecosystems (Williams et al. 2000; McConkey et al. 2003; Bie ...
... process may be substantially influenced by rodents (Mendoza and Dirzo 2007). In the Pacific, invasive non-native animals such as pigs (Sus scrofa), rats, and mice (Mus musculus) can have pronounced effects on the flora and fauna of insular ecosystems (Williams et al. 2000; McConkey et al. 2003; Bie ...
effects on plant abundance, distribution and population growth
... herbivores that reduce seed production than long-lived perennials or short-lived annuals with long-lived seed banks (Louda & Potvin 1995). Species with long lifespans, either as adults or as dormant seeds, should be more buffered from heavy herbivory, because they can compensate across years for tim ...
... herbivores that reduce seed production than long-lived perennials or short-lived annuals with long-lived seed banks (Louda & Potvin 1995). Species with long lifespans, either as adults or as dormant seeds, should be more buffered from heavy herbivory, because they can compensate across years for tim ...
Helleborus orientalis JBAPM de Lamarck
... portions of our region; cut flowers, but dispose of the vase water promptly and clean the vase as alkaloids may be absorbed in the water from the cut stems. Other Comments: This is an old fashioned perennial that has enjoyed a revival of sorts; this has coincided with a resurgence of interest by ama ...
... portions of our region; cut flowers, but dispose of the vase water promptly and clean the vase as alkaloids may be absorbed in the water from the cut stems. Other Comments: This is an old fashioned perennial that has enjoyed a revival of sorts; this has coincided with a resurgence of interest by ama ...
Xeriscape Principles Types of Garden Plants
... cactus and rocks. Apply the seven principles of Xeriscape gardening to design a beautiful yard consisting of many color and plant varieties. ...
... cactus and rocks. Apply the seven principles of Xeriscape gardening to design a beautiful yard consisting of many color and plant varieties. ...
Ash Seed Collection and Emerald Ash Borer (EAB)
... seeds are ready to collect because the seed coat is brown, the seed fills the fruit, and the embryo and endosperm are firm and not soft or milky. ...
... seeds are ready to collect because the seed coat is brown, the seed fills the fruit, and the embryo and endosperm are firm and not soft or milky. ...
Suggested Annual Flowers for Illinois
... In order to get a good start toward raising vigorous plants, viable seed packaged for the current year is recommended. Although some seed remains viable for many years, seed saved from previous years will lose vigor especially with improper storage. Seed that is not properly stored tends to germinat ...
... In order to get a good start toward raising vigorous plants, viable seed packaged for the current year is recommended. Although some seed remains viable for many years, seed saved from previous years will lose vigor especially with improper storage. Seed that is not properly stored tends to germinat ...
Document
... • Special inflorescence type: head • Example, sunflower and its relatives • Ray flowers have large fused petals (corollas fused), disk flowers small and crowded. ray flowers disk flowers ...
... • Special inflorescence type: head • Example, sunflower and its relatives • Ray flowers have large fused petals (corollas fused), disk flowers small and crowded. ray flowers disk flowers ...
Ash Seed Collection - National Seed Laboratory
... Longitudinal cut showing the developing seed. This seed is about half of its mature size. It is important to distinguish between the seed and the placental tissue next to it. Otherwise it could be concluded that the seed fills the fruit when in fact it only about half fills the fruit with the other ...
... Longitudinal cut showing the developing seed. This seed is about half of its mature size. It is important to distinguish between the seed and the placental tissue next to it. Otherwise it could be concluded that the seed fills the fruit when in fact it only about half fills the fruit with the other ...
PEN Notes for pdf - Chicago Botanic Garden
... resulted in rapid foliar decline after flowering. On the other hand, these meadow rues were the earliest to bloom so their premature decline may have been partially due to natural senescence, which was exacerbated by the conditions of the site. In addition, powdery mildew was a minor to moderate pro ...
... resulted in rapid foliar decline after flowering. On the other hand, these meadow rues were the earliest to bloom so their premature decline may have been partially due to natural senescence, which was exacerbated by the conditions of the site. In addition, powdery mildew was a minor to moderate pro ...
FIELD GUIDE FOR WILD FLOWER HARVESTING
... Inflorescence [say: in-floh-reh-sense] – A group or cluster of flowers on one stem. It is also called a ‘flower head’. A Protea ‘flower’ is really an inflorescence made up of many smaller flowers called ‘florets’. These florets are surrounded by a ring of bracts. Many other plants, e.g. aloes and ag ...
... Inflorescence [say: in-floh-reh-sense] – A group or cluster of flowers on one stem. It is also called a ‘flower head’. A Protea ‘flower’ is really an inflorescence made up of many smaller flowers called ‘florets’. These florets are surrounded by a ring of bracts. Many other plants, e.g. aloes and ag ...
Comparative Study of Colchicine Bearing Plants
... 0.4% of colchicine. The corms have aphrodisiac, carminative and laxative property. They are used in India to treat gout, rheumatism and also diseases of the liver and spleen (Wallis, 2005). When grown from seed its plant can take 4 - 5 years to flower. All parts of C. luteum, but especially the bulb ...
... 0.4% of colchicine. The corms have aphrodisiac, carminative and laxative property. They are used in India to treat gout, rheumatism and also diseases of the liver and spleen (Wallis, 2005). When grown from seed its plant can take 4 - 5 years to flower. All parts of C. luteum, but especially the bulb ...
Seed mass, shape, and persistence in the soil seed bank of Israeli
... bet-hedging adaptation to environmental uncertainty (Venable and Brown, 1988; Philippi, 1993; Pake and Venables, 1996). Based on seed longevity in soil and litter, soil seed banks are divided into transient and persistent types (Thompson and Grime, 1979). A soil seed bank is considered to be persist ...
... bet-hedging adaptation to environmental uncertainty (Venable and Brown, 1988; Philippi, 1993; Pake and Venables, 1996). Based on seed longevity in soil and litter, soil seed banks are divided into transient and persistent types (Thompson and Grime, 1979). A soil seed bank is considered to be persist ...
Transmission of rice blast from seeds to adult plants in a non
... Rice blast, caused by the fungal pathogen Magnaporthe oryzae, is a serious threat to rice production worldwide. In temperate regions, where rice is not cultivated for several months each year, little is known about the initial onset of the disease in the field. The main overwintering and primary ino ...
... Rice blast, caused by the fungal pathogen Magnaporthe oryzae, is a serious threat to rice production worldwide. In temperate regions, where rice is not cultivated for several months each year, little is known about the initial onset of the disease in the field. The main overwintering and primary ino ...
Ecology of Banksia
The ecology of Banksia refers to all the relationships and interactions among the plant genus Banksia and its environment. Banksia has a number of adaptations that have so far enabled the genus to survive despite dry, nutrient-poor soil, low rates of seed set, high rates of seed predation and low rates of seedling survival. These adaptations include proteoid roots and lignotubers; specialised floral structures that attract nectariferous animals and ensure effective pollen transfer; and the release of seed in response to bushfire.The arrival of Europeans in Australia has brought new ecological challenges. European colonisation of Australia has directly affected Banksia through deforestation, exploitation of flowers and changes to the fire regime. In addition, the accidental introduction and spread of plant pathogens such as Phytophthora cinnamomi (dieback) pose a serious threat to the genus's habitat and biodiversity. Various conservation measures have been put in place to mitigate these threats, but a number of taxa remain endangered.