...Gladiolus, crocus, freesia, babiana, etc. (3)Tuber: An underground stem that stores nutrients and thickens into a lump. Cyclamen, caladium, gloxinia, anemone, etc. ... From [Rhizome]… In most cases, underground stems are found just below ground level, but in some cases, such as horsetail and lotus, they run horizontally underground at a great depth, and in these cases, air spaces are well developed. Based on their shape, horizontally crawling stems are called rhizomes, globular or globular stems are called tubers and corms, and those with scaly leaves are called bulbs. The underground stems of ferns such as bracken and Japanese white ferns are typical rhizomes, creeping long underground and branching, but there are also rhizomes that grow obliquely or are short and erect. … From [Root]…The roots have relatively well-developed parenchyma tissue, and starch is often stored in the cells. Storage roots are those that store nutrients abnormally well. In Brassicaceae, the hypocotyl and taproot base are well developed, and in sweet potatoes, the roots (tuber) themselves are enlarged. Roots that emerge above ground are called aerial roots, and some of them function to provide ventilation. *Some of the terminology that mentions "tuber" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…グラジオラス,クロッカス,フリージア,バビアナなど。(3)塊茎tuber 地下の茎に養分を蓄えて肥厚し塊状となったもの。シクラメン,カラジウム,グロキシニア,アネモネなど。… 【地下茎】より… 地下茎は地面からすぐ下にある場合が多いが,スギナやハスなどのようにかなり深く地中を横走することもあり,これらの場合通気腔が発達している。地下茎はその形状から,横にはうものを根茎rhizome,塊状,球状のものを塊茎tuber,球茎corm,鱗片葉がつくものを鱗茎bulbなどという。シダ類のワラビやウラジロの地下茎は地中を長くはい,枝分れし,典型的な根茎であるが,斜上したり短く直立する根茎もある。… 【根】より…根には柔組織が比較的よく発達しているが,その細胞にデンプンが貯蔵されていることが多い。養分の貯蔵が異常に発達したものが貯蔵根storage rootで,アブラナ科のものでは胚軸と主根の基部がよく発達するし,サツマイモでは根(塊根tuber)そのものが肥大している。根が地上に現れたものを気根といい,通気のはたらきをするものもある。… ※「tuber」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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