The Cycads
... erence book for both botanist and gardener by bringing together all the information that is available on each genus and species. There are few other groups of plants, with the possible exception of palms, that can rival cycads for variety of foliage, size, and general habit. Cycads are very ornament ...
... erence book for both botanist and gardener by bringing together all the information that is available on each genus and species. There are few other groups of plants, with the possible exception of palms, that can rival cycads for variety of foliage, size, and general habit. Cycads are very ornament ...
Hypomethylation Promotes Autonomous Endosperm Development
... be due, at least in part, to a defect in endosperm development. Finally, we show that pollen from hypomethylated plants rescues fie-1 mutant seeds provided that it also donates a wild-type paternal FIE allele. These results are discussed in light of models for parent-of-origin effects on seed develo ...
... be due, at least in part, to a defect in endosperm development. Finally, we show that pollen from hypomethylated plants rescues fie-1 mutant seeds provided that it also donates a wild-type paternal FIE allele. These results are discussed in light of models for parent-of-origin effects on seed develo ...
influences of temperature on arachis hypogaea l.
... component parts. Thus leaf growth may influence stem growth etc.Itisalso possible that theoptimum temperature for stem growth may notnecessarily bethesameas that for fertilization. The investigations ofBLAAUW etal. (7) with the hyacinth clearly demonstrated the differential response ofplants in thei ...
... component parts. Thus leaf growth may influence stem growth etc.Itisalso possible that theoptimum temperature for stem growth may notnecessarily bethesameas that for fertilization. The investigations ofBLAAUW etal. (7) with the hyacinth clearly demonstrated the differential response ofplants in thei ...
TREES OF the ACADIAN FOREST
... Layering - a method of plant propagation in which a stem is induced to send out roots when it is surrounded by soil (and still attached to a parent plant). Leaf - on a plant, the main organ of photosynthesis (thus often green) often made up of a lamina (or blade) which is attached to the stem or roo ...
... Layering - a method of plant propagation in which a stem is induced to send out roots when it is surrounded by soil (and still attached to a parent plant). Leaf - on a plant, the main organ of photosynthesis (thus often green) often made up of a lamina (or blade) which is attached to the stem or roo ...
2013: The Carboniferous-Permian Flora from Niederhausen
... were recovered. Perneria thomsonii nov. gen. n. sp. is suggested to be close to the crown group of all conifers. It can be argued that we have to include this species with the last representative of an ancestral family like the Progymnosperms, but at the same time, due to its cone-structure, bracts, ...
... were recovered. Perneria thomsonii nov. gen. n. sp. is suggested to be close to the crown group of all conifers. It can be argued that we have to include this species with the last representative of an ancestral family like the Progymnosperms, but at the same time, due to its cone-structure, bracts, ...
ORIGIN OF CYCADS
... western part from Piz da Peres contains, in some layers, a typical rainy season anthesis with a dominance of male pollen-organs. More young plants and fructifications were found there. The long-ranging mountain from Kühwiesenkopf to Drei Fingerspitze, on the other hand, was richer in fully-grown fem ...
... western part from Piz da Peres contains, in some layers, a typical rainy season anthesis with a dominance of male pollen-organs. More young plants and fructifications were found there. The long-ranging mountain from Kühwiesenkopf to Drei Fingerspitze, on the other hand, was richer in fully-grown fem ...
by wympher langstang - NEHU Institutional Repository
... family Ericaceae also known as Heath family, is an evergreen ericaceous shrubs found in Indo-Malaya, North-East India; common at higher elevation in Shillong about 1500m a.s.l., particularly under pine forests and open places. (Haridasan and Rao 1985; Meher - Homji 1972). Locally it is known as Jirh ...
... family Ericaceae also known as Heath family, is an evergreen ericaceous shrubs found in Indo-Malaya, North-East India; common at higher elevation in Shillong about 1500m a.s.l., particularly under pine forests and open places. (Haridasan and Rao 1985; Meher - Homji 1972). Locally it is known as Jirh ...
Agastache `Blue Fortune`
... H.pubescens hybrid. C. & M.Oliver. A new and very vigorous selection from the Olivers of The Primrose Path. Young foliage is silver with a purple flush, becoming clear silver at bloom time; the undersides of the leaves are dark red-purple. The leaves are about 4" across. White flowers are borne on 18" ...
... H.pubescens hybrid. C. & M.Oliver. A new and very vigorous selection from the Olivers of The Primrose Path. Young foliage is silver with a purple flush, becoming clear silver at bloom time; the undersides of the leaves are dark red-purple. The leaves are about 4" across. White flowers are borne on 18" ...
GAMETOPHYTIC SELECTION FOR
... The primary objective of any plant breeding program is the improvement of those characteristics that contribute to economic value. These characteristics may range from increased yield, ability to tolerate abiotic stresses, resistance to pathogens and pests or even enhancement of aesthetic appeal (Fe ...
... The primary objective of any plant breeding program is the improvement of those characteristics that contribute to economic value. These characteristics may range from increased yield, ability to tolerate abiotic stresses, resistance to pathogens and pests or even enhancement of aesthetic appeal (Fe ...
Trees of the Gila Forest Region, New Mexico
... shared by colleagues. The trees are listed alphabetically by family, genus, and species, except that we have grouped the families of conifers (Coniferophyta, gymnosperms), monocots (Liliopsida), and eudicots (Magnoliopsida). The accepted names of trees established and reproducing or propagating in t ...
... shared by colleagues. The trees are listed alphabetically by family, genus, and species, except that we have grouped the families of conifers (Coniferophyta, gymnosperms), monocots (Liliopsida), and eudicots (Magnoliopsida). The accepted names of trees established and reproducing or propagating in t ...
The Arabidopsis Plastidic Glucose 6
... the anther in the stamen. The postmeiotic haploid microspore undergoes an asymmetric mitosis (pollen mitosis I), which results in a vegetative and a generative cell. The generative cell then undergoes a second mitosis to form two sperm cells (for review, see Mascarenhas, 1989; Twell et al., 1998; Mc ...
... the anther in the stamen. The postmeiotic haploid microspore undergoes an asymmetric mitosis (pollen mitosis I), which results in a vegetative and a generative cell. The generative cell then undergoes a second mitosis to form two sperm cells (for review, see Mascarenhas, 1989; Twell et al., 1998; Mc ...
RARAMURI NECKLACES: A RAPIDLY CHANGING FOLK
... About necklace-making.-Raramuri generally soak the beans, seeds, or fruit until they are soft enough to be pierced by a modern stainless steel sewing needle. Madrone fruit are strung while still fresh and soft, and then allowed to dry and shrink down tight against the thread. The Job's tears are sai ...
... About necklace-making.-Raramuri generally soak the beans, seeds, or fruit until they are soft enough to be pierced by a modern stainless steel sewing needle. Madrone fruit are strung while still fresh and soft, and then allowed to dry and shrink down tight against the thread. The Job's tears are sai ...
Activity Set A: Background for Inquiries Investigating Pollen in Plant
... a. You might simply shake the flower or cone over the slide. b. You might remove a stamen and brush its anther lightly over the slide. c. You might also use the dissecting probe or pin to agitate the flower or cone over the slide to loosen pollen d. If pollen is clumped up, try to break it up and sp ...
... a. You might simply shake the flower or cone over the slide. b. You might remove a stamen and brush its anther lightly over the slide. c. You might also use the dissecting probe or pin to agitate the flower or cone over the slide to loosen pollen d. If pollen is clumped up, try to break it up and sp ...
Chapter 4 - Aggie Horticulture
... pollen that does not depend on water for male gamete transfer. Seed plants are separated into gymnosperms and angiosperms. Gymnosperms include the cycads, ginkgo, gnetophytes (Ephedra, Gnetum) and the conifers (like pine, fir, and hemlock). The term gymnosperm means “naked seeds” and refers to the a ...
... pollen that does not depend on water for male gamete transfer. Seed plants are separated into gymnosperms and angiosperms. Gymnosperms include the cycads, ginkgo, gnetophytes (Ephedra, Gnetum) and the conifers (like pine, fir, and hemlock). The term gymnosperm means “naked seeds” and refers to the a ...
Toward in vitro fertilization in Brachiaria spp.
... stigmatic hairs were observed, as a consequence of the high density of pollen tubes reducing the tube growth (Kaushal and Sidhu 2000). In contrast to Brachiaria, Pennisetum had many pollen tubes reach the ovary, and this number increased with time after pollination. In rice, most of the pollen tubes ...
... stigmatic hairs were observed, as a consequence of the high density of pollen tubes reducing the tube growth (Kaushal and Sidhu 2000). In contrast to Brachiaria, Pennisetum had many pollen tubes reach the ovary, and this number increased with time after pollination. In rice, most of the pollen tubes ...
Document
... genetic constitution of the two haploid cells fuses, making a diploid cell which is now called a fertilized ovule. Fertilization may take place immediately after pollination or, as is the case for most gymnosperms, several weeks or months later. After fertilization the ovule enlarges and divides and ...
... genetic constitution of the two haploid cells fuses, making a diploid cell which is now called a fertilized ovule. Fertilization may take place immediately after pollination or, as is the case for most gymnosperms, several weeks or months later. After fertilization the ovule enlarges and divides and ...
2 - Forskning
... genetic constitution of the two haploid cells fuses, making a diploid cell which is now called a fertilized ovule. Fertilization may take place immediately after pollination or, as is the case for most gymnosperms, several weeks or months later. After fertilization the ovule enlarges and divides and ...
... genetic constitution of the two haploid cells fuses, making a diploid cell which is now called a fertilized ovule. Fertilization may take place immediately after pollination or, as is the case for most gymnosperms, several weeks or months later. After fertilization the ovule enlarges and divides and ...
Document
... genetic constitution of the two haploid cells fuses, making a diploid cell which is now called a fertilized ovule. Fertilization may take place immediately after pollination or, as is the case for most gymnosperms, several weeks or months later. After fertilization the ovule enlarges and divides and ...
... genetic constitution of the two haploid cells fuses, making a diploid cell which is now called a fertilized ovule. Fertilization may take place immediately after pollination or, as is the case for most gymnosperms, several weeks or months later. After fertilization the ovule enlarges and divides and ...
Document
... genetic constitution of the two haploid cells fuses, making a diploid cell which is now called a fertilized ovule. Fertilization may take place immediately after pollination or, as is the case for most gymnosperms, several weeks or months later. After fertilization the ovule enlarges and divides and ...
... genetic constitution of the two haploid cells fuses, making a diploid cell which is now called a fertilized ovule. Fertilization may take place immediately after pollination or, as is the case for most gymnosperms, several weeks or months later. After fertilization the ovule enlarges and divides and ...
- ISpatula
... 31) Similar to cacti and euphorbs, conifers often have leaves that are modified into a needle -like shape–an adaptation to arid environments. Yet, the taiga bioprovince of the northern hemisphere and the slopes of mountain ranges receive plenty of annual precipitation and have dense conifer forests ...
... 31) Similar to cacti and euphorbs, conifers often have leaves that are modified into a needle -like shape–an adaptation to arid environments. Yet, the taiga bioprovince of the northern hemisphere and the slopes of mountain ranges receive plenty of annual precipitation and have dense conifer forests ...
edulabz - Testlabz.com
... Ans. Reproduction is necessary for living organism because it maintains the genetic continuity among a species and it allows to increase in the total numbers of a species. Reproduction means to produce young ones of their own kind. It is one of the most important properties of living organism. For e ...
... Ans. Reproduction is necessary for living organism because it maintains the genetic continuity among a species and it allows to increase in the total numbers of a species. Reproduction means to produce young ones of their own kind. It is one of the most important properties of living organism. For e ...
Identifying Pennsylvania Trees
... yellow to gray; at first hairy, later smooth; zigzag. Buds very long, slender, sharp pointed, and covered by 10 – 20 reddish-brown scales. Fruit: a stalked, prickly 4-valved bur containing triangular, pale-brown, shining nuts. Bark: smooth, light gray, mottled with dark spots. General: found on mois ...
... yellow to gray; at first hairy, later smooth; zigzag. Buds very long, slender, sharp pointed, and covered by 10 – 20 reddish-brown scales. Fruit: a stalked, prickly 4-valved bur containing triangular, pale-brown, shining nuts. Bark: smooth, light gray, mottled with dark spots. General: found on mois ...
The living cycads - The Arizona Palm and Cycad Association
... The Cuban genus was named Microcycas from a few small leaves which seemed to resemble the Japanese Cycas, except that they were smaller (Fig. 3). ...
... The Cuban genus was named Microcycas from a few small leaves which seemed to resemble the Japanese Cycas, except that they were smaller (Fig. 3). ...
Tree diversity and economic importance of forest trees of Kashmir
... belonging to 33 genera under 21 families. The most dominant family as per the number of genera is Pinaceae family followed by Betulaceae. And the most dominant genera is Prunus which is having 6 species. The study reveals that there are 10 gymnosperms and 43 angiosperms in the forests of Kashmir. Th ...
... belonging to 33 genera under 21 families. The most dominant family as per the number of genera is Pinaceae family followed by Betulaceae. And the most dominant genera is Prunus which is having 6 species. The study reveals that there are 10 gymnosperms and 43 angiosperms in the forests of Kashmir. Th ...
Contributions of Panchanan Maheshwari`s school to angiosperm
... apomicts and do not produce sexual seeds at all20. The egg degenerates and the embryos are produced as a result ...
... apomicts and do not produce sexual seeds at all20. The egg degenerates and the embryos are produced as a result ...
Pinophyta
The conifers, division Pinophyta, also known as division Coniferophyta or Coniferae, are one of 12 extant division-level taxa within the Kingdom Plantae (Viridiplantae) and 10 within the extant land plants. Pinophytes are gymnosperms, cone-bearing seed plants with vascular tissue. All extant conifers are woody plants with secondary growth, the great majority being trees with just a few being shrubs. Typical examples of conifers include cedars, Douglas-firs, cypresses, firs, junipers, kauri, larches, pines, hemlocks, redwoods, spruces, and yews. The division contains approximately eight families, 68 genera, and 630 living species.Although the total number of species is relatively small, conifers are of immense ecological importance. They are the dominant plants over huge areas of land, most notably the boreal forests of the northern hemisphere, but also in similar cool climates in mountains further south. Boreal conifers have many wintertime adaptations. The narrow conical shape of northern conifers, and their downward-drooping limbs, help them shed snow. Many of them seasonally alter their biochemistry to make them more resistant to freezing, called ""hardening"". While tropical rainforests have more biodiversity and turnover, the immense conifer forests of the world represent the largest terrestrial carbon sink, i.e. where carbon from atmospheric CO2 is bound as organic compounds.They are also of great economic value, primarily for timber and paper production; the wood of conifers is known as softwood.Conifer is a Latin word, a compound of conus (cone) and ferre (to bear), meaning ""the one that bears (a) cone(s)"".